src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Encode;
   9 use File::Basename;
  10 use File::Path;
  11 use IO::File;
  12 use Net::IP;
  13 use POSIX;
  14 use Socket qw(AF_INET6 inet_ntop inet_pton);
  15 use Storable qw(dclone);
  16
  17 use PVE::Cluster;
  18 use PVE::Exception qw(raise raise_param_exc);
  19 use PVE::INotify;
  20 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  21 use PVE::Network;
  22 use PVE::ProcFSTools;
  23 use PVE::SafeSyslog;
  24 use PVE::Tools qw($IPV4RE $IPV6RE);
  25 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  26
  27 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  28 my $pvefw_conf_dir = "/etc/pve/firewall";
  29 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  30
  31 # dynamically include PVE::QemuServer and PVE::LXC
  32 # to avoid dependency problems
  33 my $have_qemu_server;
  34 eval {
  35     require PVE::QemuServer;
  36     require PVE::QemuConfig;
  37     $have_qemu_server = 1;
  38 };
  39
  40 my $have_lxc;
  41 eval {
  42     require PVE::LXC;
  43     $have_lxc = 1;
  44 };
  45
  46 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  47
  48 mkdir $pve_fw_status_dir; # make sure this exists
  49
  50 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  51 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  52 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  53
  54 my $max_alias_name_length = 64;
  55 my $max_ipset_name_length = 64;
  56 my $max_group_name_length = 18;
  57
  58 my $PROTOCOLS_WITH_PORTS = {
  59     udp => 1,     17 => 1,
  60     udplite => 1, 136 => 1,
  61     tcp => 1,     6 => 1,
  62     dccp => 1,    33 => 1,
  63     sctp => 1,    132 => 1,
  64 };
  65
  66 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  67 sub pve_verify_ip_or_cidr {
  68     my ($cidr, $noerr) = @_;
  69
  70     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  71         return $cidr if Net::IP->new($cidr);
  72         return undef if $noerr;
  73         die Net::IP::Error() . "\n";
  74     }
  75     return undef if $noerr;
  76     die "value does not look like a valid IP address or CIDR network\n";
  77 }
  78
  79 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  80 sub pve_verify_ip_or_cidr_or_alias {
  81     my ($cidr, $noerr) = @_;
  82
  83     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  84
  85     return pve_verify_ip_or_cidr($cidr, $noerr);
  86 }
  87
  88 PVE::JSONSchema::register_standard_option('ipset-name', {
  89     description => "IP set name.",
  90     type => 'string',
  91     pattern => $ipset_name_pattern,
  92     minLength => 2,
  93     maxLength => $max_ipset_name_length,
  94 });
  95
  96 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  97     description => "Alias name.",
  98     type => 'string',
  99     pattern => $ip_alias_pattern,
 100     minLength => 2,
 101     maxLength => $max_alias_name_length,
 102 });
 103
 104 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
 105     description => "Log level.",
 106     type => 'string',
 107     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
 108     optional => 1,
 109 });
 110
 111 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 112     description => "Security Group name.",
 113     type => 'string',
 114     pattern => $security_group_name_pattern,
 115     minLength => 2,
 116     maxLength => $max_group_name_length,
 117 });
 118
 119 my $feature_ipset_nomatch = 0;
 120 eval  {
 121     my (undef, undef, $release) = POSIX::uname();
 122     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 123         my ($major, $minor) = ($1, $2);
 124         $feature_ipset_nomatch = 1 if ($major > 3) ||
 125             ($major == 3 && $minor >= 7);
 126     }
 127
 128 };
 129
 130 my $nodename = PVE::INotify::nodename();
 131
 132 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 133
 134 my $default_log_level = 'nolog'; # avoid logs by default
 135 my $global_log_ratelimit = '--limit 1/sec';
 136
 137 my $log_level_hash = {
 138     debug => 7,
 139     info => 6,
 140     notice => 5,
 141     warning => 4,
 142     err => 3,
 143     crit => 2,
 144     alert => 1,
 145     emerg => 0,
 146 };
 147
 148 my $verbose = 0;
 149 sub set_verbose {
 150     $verbose = shift;
 151 }
 152
 153 # %rule
 154 #
 155 # name => optional
 156 # enable => [0|1]
 157 # action =>
 158 # proto =>
 159 # sport => port[,port[,port]].. or port:port
 160 # dport => port[,port[,port]].. or port:port
 161 # log => optional, loglevel
 162 # logmsg => optional, logmsg - overwrites default
 163 # iface_in => incomin interface
 164 # iface_out => outgoing interface
 165 # match => optional, overwrites generation of match
 166 # target => optional, overwrites action
 167
 168 # we need to overwrite some macros for ipv6
 169 my $pve_ipv6fw_macros = {
 170     'Ping' => [
 171         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 172     ],
 173     'NeighborDiscovery' => [
 174         "IPv6 neighbor solicitation, neighbor and router advertisement",
 175         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 176         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 177         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 178         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 179     ],
 180     'DHCPv6' => [
 181         "DHCPv6 traffic",
 182         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 183     ],
 184     'Trcrt' => [
 185         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 186         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 187     ],
 188  };
 189
 190 # imported/converted from: /usr/share/shorewall/macro.*
 191 my $pve_fw_macros = {
 192     'Amanda' => [
 193         "Amanda Backup",
 194         { action => 'PARAM', proto => 'udp', dport => '10080' },
 195         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 196     ],
 197     'Auth' => [
 198         "Auth (identd) traffic",
 199         { action => 'PARAM', proto => 'tcp', dport => '113' },
 200     ],
 201     'BGP' => [
 202         "Border Gateway Protocol traffic",
 203         { action => 'PARAM', proto => 'tcp', dport => '179' },
 204     ],
 205     'BitTorrent' => [
 206         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 207         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 208         { action => 'PARAM', proto => 'udp', dport => '6881' },
 209     ],
 210     'BitTorrent32' => [
 211         "BitTorrent traffic for BitTorrent 3.2 and later",
 212         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 213         { action => 'PARAM', proto => 'udp', dport => '6881' },
 214     ],
 215     'Ceph' => [
 216         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 217         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 218         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 219     ],
 220     'CVS' => [
 221         "Concurrent Versions System pserver traffic",
 222         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 223     ],
 224     'Citrix' => [
 225         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 226         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 227         { action => 'PARAM', proto => 'udp', dport => '1604' },
 228         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 229     ],
 230     'DAAP' => [
 231         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 232         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 233         { action => 'PARAM', proto => 'udp', dport => '3689' },
 234     ],
 235     'DCC' => [
 236         "Distributed Checksum Clearinghouse spam filtering mechanism",
 237         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 238     ],
 239     'DHCPfwd' => [
 240         "Forwarded DHCP traffic",
 241         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 242     ],
 243     'DNS' => [
 244         "Domain Name System traffic (upd and tcp)",
 245         { action => 'PARAM', proto => 'udp', dport => '53' },
 246         { action => 'PARAM', proto => 'tcp', dport => '53' },
 247     ],
 248     'Distcc' => [
 249         "Distributed Compiler service",
 250         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 251     ],
 252     'FTP' => [
 253         "File Transfer Protocol",
 254         { action => 'PARAM', proto => 'tcp', dport => '21' },
 255     ],
 256     'Finger' => [
 257         "Finger protocol (RFC 742)",
 258         { action => 'PARAM', proto => 'tcp', dport => '79' },
 259     ],
 260     'GNUnet' => [
 261         "GNUnet secure peer-to-peer networking traffic",
 262         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 263         { action => 'PARAM', proto => 'udp', dport => '2086' },
 264         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 265         { action => 'PARAM', proto => 'udp', dport => '1080' },
 266     ],
 267     'GRE' => [
 268         "Generic Routing Encapsulation tunneling protocol",
 269         { action => 'PARAM', proto => '47' },
 270     ],
 271     'Git' => [
 272         "Git distributed revision control traffic",
 273         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 274     ],
 275     'HKP' => [
 276         "OpenPGP HTTP keyserver protocol traffic",
 277         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 278     ],
 279     'HTTP' => [
 280         "Hypertext Transfer Protocol (WWW)",
 281         { action => 'PARAM', proto => 'tcp', dport => '80' },
 282     ],
 283     'HTTPS' => [
 284         "Hypertext Transfer Protocol (WWW) over SSL",
 285         { action => 'PARAM', proto => 'tcp', dport => '443' },
 286     ],
 287     'ICPV2' => [
 288         "Internet Cache Protocol V2 (Squid) traffic",
 289         { action => 'PARAM', proto => 'udp', dport => '3130' },
 290     ],
 291     'ICQ' => [
 292         "AOL Instant Messenger traffic",
 293         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 294     ],
 295     'IMAP' => [
 296         "Internet Message Access Protocol",
 297         { action => 'PARAM', proto => 'tcp', dport => '143' },
 298     ],
 299     'IMAPS' => [
 300         "Internet Message Access Protocol over SSL",
 301         { action => 'PARAM', proto => 'tcp', dport => '993' },
 302     ],
 303     'IPIP' => [
 304         "IPIP capsulation traffic",
 305         { action => 'PARAM', proto => '94' },
 306     ],
 307     'IPsec' => [
 308         "IPsec traffic",
 309         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 310         { action => 'PARAM', proto => '50' },
 311     ],
 312     'IPsecah' => [
 313         "IPsec authentication (AH) traffic",
 314         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 315         { action => 'PARAM', proto => '51' },
 316     ],
 317     'IPsecnat' => [
 318         "IPsec traffic and Nat-Traversal",
 319         { action => 'PARAM', proto => 'udp', dport => '500' },
 320         { action => 'PARAM', proto => 'udp', dport => '4500' },
 321         { action => 'PARAM', proto => '50' },
 322     ],
 323     'IRC' => [
 324         "Internet Relay Chat traffic",
 325         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 326     ],
 327     'Jetdirect' => [
 328         "HP Jetdirect printing",
 329         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 330     ],
 331     'L2TP' => [
 332         "Layer 2 Tunneling Protocol traffic",
 333         { action => 'PARAM', proto => 'udp', dport => '1701' },
 334     ],
 335     'LDAP' => [
 336         "Lightweight Directory Access Protocol traffic",
 337         { action => 'PARAM', proto => 'tcp', dport => '389' },
 338     ],
 339     'LDAPS' => [
 340         "Secure Lightweight Directory Access Protocol traffic",
 341         { action => 'PARAM', proto => 'tcp', dport => '636' },
 342     ],
 343     'MSNP' => [
 344         "Microsoft Notification Protocol",
 345         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 346     ],
 347     'MSSQL' => [
 348         "Microsoft SQL Server",
 349         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 350     ],
 351     'Mail' => [
 352         "Mail traffic (SMTP, SMTPS, Submission)",
 353         { action => 'PARAM', proto => 'tcp', dport => '25' },
 354         { action => 'PARAM', proto => 'tcp', dport => '465' },
 355         { action => 'PARAM', proto => 'tcp', dport => '587' },
 356     ],
 357     'MDNS' => [
 358         "Multicast DNS",
 359         { action => 'PARAM', proto => 'udp', dport => '5353' },
 360     ],
 361     'Munin' => [
 362         "Munin networked resource monitoring traffic",
 363         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 364     ],
 365     'MySQL' => [
 366         "MySQL server",
 367         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 368     ],
 369     'NNTP' => [
 370         "NNTP traffic (Usenet).",
 371         { action => 'PARAM', proto => 'tcp', dport => '119' },
 372     ],
 373     'NNTPS' => [
 374         "Encrypted NNTP traffic (Usenet)",
 375         { action => 'PARAM', proto => 'tcp', dport => '563' },
 376     ],
 377     'NTP' => [
 378         "Network Time Protocol (ntpd)",
 379         { action => 'PARAM', proto => 'udp', dport => '123' },
 380     ],
 381     'OSPF' => [
 382         "OSPF multicast traffic",
 383         { action => 'PARAM', proto => '89' },
 384     ],
 385     'OpenVPN' => [
 386         "OpenVPN traffic",
 387         { action => 'PARAM', proto => 'udp', dport => '1194' },
 388     ],
 389     'PCA' => [
 390         "Symantec PCAnywere (tm)",
 391         { action => 'PARAM', proto => 'udp', dport => '5632' },
 392         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 393     ],
 394     'POP3' => [
 395         "POP3 traffic",
 396         { action => 'PARAM', proto => 'tcp', dport => '110' },
 397     ],
 398     'POP3S' => [
 399         "Encrypted POP3 traffic",
 400         { action => 'PARAM', proto => 'tcp', dport => '995' },
 401     ],
 402     'PPtP' => [
 403         "Point-to-Point Tunneling Protocol",
 404         { action => 'PARAM', proto => '47' },
 405         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 406     ],
 407     'Ping' => [
 408         "ICMP echo request",
 409         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 410     ],
 411     'PostgreSQL' => [
 412         "PostgreSQL server",
 413         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 414     ],
 415     'Printer' => [
 416         "Line Printer protocol printing",
 417         { action => 'PARAM', proto => 'tcp', dport => '515' },
 418     ],
 419     'RDP' => [
 420         "Microsoft Remote Desktop Protocol traffic",
 421         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 422     ],
 423     'RIP' => [
 424         "Routing Information Protocol (bidirectional)",
 425         { action => 'PARAM', proto => 'udp', dport => '520' },
 426     ],
 427     'RNDC' => [
 428         "BIND remote management protocol",
 429         { action => 'PARAM', proto => 'tcp', dport => '953' },
 430     ],
 431     'Razor' => [
 432         "Razor Antispam System",
 433         { action => 'PARAM', proto => 'tcp', dport => '2703' },
 434     ],
 435     'Rdate' => [
 436         "Remote time retrieval (rdate)",
 437         { action => 'PARAM', proto => 'tcp', dport => '37' },
 438     ],
 439     'Rsync' => [
 440         "Rsync server",
 441         { action => 'PARAM', proto => 'tcp', dport => '873' },
 442     ],
 443     'SANE' => [
 444         "SANE network scanning",
 445         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 446     ],
 447     'SMB' => [
 448         "Microsoft SMB traffic",
 449         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 450         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 451         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 452         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 453     ],
 454     'SMBswat' => [
 455         "Samba Web Administration Tool",
 456         { action => 'PARAM', proto => 'tcp', dport => '901' },
 457     ],
 458     'SMTP' => [
 459         "Simple Mail Transfer Protocol",
 460         { action => 'PARAM', proto => 'tcp', dport => '25' },
 461     ],
 462     'SMTPS' => [
 463         "Encrypted Simple Mail Transfer Protocol",
 464         { action => 'PARAM', proto => 'tcp', dport => '465' },
 465     ],
 466     'SNMP' => [
 467         "Simple Network Management Protocol",
 468         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 469         { action => 'PARAM', proto => 'tcp', dport => '161' },
 470     ],
 471     'SPAMD' => [
 472         "Spam Assassin SPAMD traffic",
 473         { action => 'PARAM', proto => 'tcp', dport => '783' },
 474     ],
 475     'SSH' => [
 476         "Secure shell traffic",
 477         { action => 'PARAM', proto => 'tcp', dport => '22' },
 478     ],
 479     'SVN' => [
 480         "Subversion server (svnserve)",
 481         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 482     ],
 483     'SixXS' => [
 484         "SixXS IPv6 Deployment and Tunnel Broker",
 485         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 486         { action => 'PARAM', proto => 'udp', dport => '3740' },
 487         { action => 'PARAM', proto => '41' },
 488         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 489     ],
 490     'Squid' => [
 491         "Squid web proxy traffic",
 492         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 493     ],
 494     'Submission' => [
 495         "Mail message submission traffic",
 496         { action => 'PARAM', proto => 'tcp', dport => '587' },
 497     ],
 498     'Syslog' => [
 499         "Syslog protocol (RFC 5424) traffic",
 500         { action => 'PARAM', proto => 'udp', dport => '514' },
 501         { action => 'PARAM', proto => 'tcp', dport => '514' },
 502     ],
 503     'TFTP' => [
 504         "Trivial File Transfer Protocol traffic",
 505         { action => 'PARAM', proto => 'udp', dport => '69' },
 506     ],
 507     'Telnet' => [
 508         "Telnet traffic",
 509         { action => 'PARAM', proto => 'tcp', dport => '23' },
 510     ],
 511     'Telnets' => [
 512         "Telnet over SSL",
 513         { action => 'PARAM', proto => 'tcp', dport => '992' },
 514     ],
 515     'Time' => [
 516         "RFC 868 Time protocol",
 517         { action => 'PARAM', proto => 'tcp', dport => '37' },
 518     ],
 519     'Trcrt' => [
 520         "Traceroute (for up to 30 hops) traffic",
 521         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 522         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 523     ],
 524     'VNC' => [
 525         "VNC traffic for VNC display's 0 - 99",
 526         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 527     ],
 528     'VNCL' => [
 529         "VNC traffic from Vncservers to Vncviewers in listen mode",
 530         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 531     ],
 532     'Web' => [
 533         "WWW traffic (HTTP and HTTPS)",
 534         { action => 'PARAM', proto => 'tcp', dport => '80' },
 535         { action => 'PARAM', proto => 'tcp', dport => '443' },
 536     ],
 537     'Webcache' => [
 538         "Web Cache/Proxy traffic (port 8080)",
 539         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 540     ],
 541     'Webmin' => [
 542         "Webmin traffic",
 543         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 544     ],
 545     'Whois' => [
 546         "Whois (nicname, RFC 3912) traffic",
 547         { action => 'PARAM', proto => 'tcp', dport => '43' },
 548     ],
 549 };
 550
 551 my $pve_fw_parsed_macros;
 552 my $pve_fw_macro_descr;
 553 my $pve_fw_macro_ipversion = {};
 554 my $pve_fw_preferred_macro_names = {};
 555
 556 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 557 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 558
 559 my $pve_std_chains = {};
 560 my $pve_std_chains_conf = {};
 561 $pve_std_chains_conf->{4} = {
 562     'PVEFW-SET-ACCEPT-MARK' => [
 563         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 564     ],
 565     'PVEFW-DropBroadcast' => [
 566         # same as shorewall 'Broadcast'
 567         # simply DROP BROADCAST/MULTICAST/ANYCAST
 568         # we can use this to reduce logging
 569         { action => 'DROP', dsttype => 'BROADCAST' },
 570         { action => 'DROP', dsttype => 'MULTICAST' },
 571         { action => 'DROP', dsttype => 'ANYCAST' },
 572         { action => 'DROP', dest => '224.0.0.0/4' },
 573     ],
 574     'PVEFW-reject' => [
 575         # same as shorewall 'reject'
 576         { action => 'DROP', dsttype => 'BROADCAST' },
 577         { action => 'DROP', source => '224.0.0.0/4' },
 578         { action => 'DROP', proto => 'icmp' },
 579         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 580         { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
 581         { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
 582         { target => '-j REJECT --reject-with icmp-host-prohibited' },
 583     ],
 584     'PVEFW-Drop' => [
 585         # same as shorewall 'Drop', which is equal to DROP,
 586         # but REJECT/DROP some packages to reduce logging,
 587         # and ACCEPT critical ICMP types
 588         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 589         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 590         { action => 'PVEFW-DropBroadcast' },
 591         # ACCEPT critical ICMP types
 592         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 593         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 594         # Drop packets with INVALID state
 595         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 596         # Drop Microsoft SMB noise
 597         { action => 'DROP', proto => 'udp', dport => '135,445' },
 598         { action => 'DROP', proto => 'udp', dport => '137:139' },
 599         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 600         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 601         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 602         # Drop new/NotSyn traffic so that it doesn't get logged
 603         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 604         # Drop DNS replies
 605         { action => 'DROP', proto => 'udp', sport => 53 },
 606     ],
 607     'PVEFW-Reject' => [
 608         # same as shorewall 'Reject', which is equal to Reject,
 609         # but REJECT/DROP some packages to reduce logging,
 610         # and ACCEPT critical ICMP types
 611         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 612         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 613         { action => 'PVEFW-DropBroadcast' },
 614         # ACCEPT critical ICMP types
 615         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 616         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 617         # Drop packets with INVALID state
 618         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 619         # Drop Microsoft SMB noise
 620         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 621         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 622         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 623         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 624         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 625         # Drop new/NotSyn traffic so that it doesn't get logged
 626         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 627         # Drop DNS replies
 628         { action => 'DROP', proto => 'udp', sport => 53 },
 629     ],
 630     'PVEFW-tcpflags' => [
 631         # same as shorewall tcpflags action.
 632         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 633         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 634         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 635         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 636         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 637         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 638     ],
 639     'PVEFW-smurfs' => [
 640         # same as shorewall smurfs action
 641         # Filter packets for smurfs (packets with a broadcast address as the source).
 642         { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
 643         { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
 644         { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
 645     ],
 646     'PVEFW-smurflog' => [
 647         { action => 'DROP', logmsg => 'DROP: ' },
 648     ],
 649     'PVEFW-logflags' => [
 650         { action => 'DROP', logmsg => 'DROP: ' },
 651     ],
 652 };
 653
 654 $pve_std_chains_conf->{6} = {
 655     'PVEFW-SET-ACCEPT-MARK' => [
 656         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 657     ],
 658     'PVEFW-DropBroadcast' => [
 659         # same as shorewall 'Broadcast'
 660         # simply DROP BROADCAST/MULTICAST/ANYCAST
 661         # we can use this to reduce logging
 662         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 663         # ipv6 addrtype does not work with kernel 2.6.32
 664         #{ action => 'DROP', dsttype => 'MULTICAST' },
 665         #{ action => 'DROP', dsttype => 'ANYCAST' },
 666         { action => 'DROP', dest => 'ff00::/8' },
 667         #{ action => 'DROP', dest => '224.0.0.0/4' },
 668     ],
 669     'PVEFW-reject' => [
 670         # same as shorewall 'reject'
 671         #{ action => 'DROP', dsttype => 'BROADCAST' },
 672         #{ action => 'DROP', source => '224.0.0.0/4' },
 673         { action => 'DROP', proto => 'icmpv6' },
 674         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 675         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 676         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 677         #"-j REJECT --reject-with icmp-host-prohibited",
 678     ],
 679     'PVEFW-Drop' => [
 680         # same as shorewall 'Drop', which is equal to DROP,
 681         # but REJECT/DROP some packages to reduce logging,
 682         # and ACCEPT critical ICMP types
 683         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 684         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 685         { action => 'PVEFW-DropBroadcast' },
 686         # ACCEPT critical ICMP types
 687         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 688         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 689         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 690         # Drop packets with INVALID state
 691         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 692         # Drop Microsoft SMB noise
 693         { action => 'DROP', proto => 'udp', dport => '135,445' },
 694         { action => 'DROP', proto => 'udp', dport => '137:139'},
 695         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 696         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 697         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 698         # Drop new/NotSyn traffic so that it doesn't get logged
 699         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 700         # Drop DNS replies
 701         { action => 'DROP', proto => 'udp', sport => 53 },
 702     ],
 703     'PVEFW-Reject' => [
 704         # same as shorewall 'Reject', which is equal to Reject,
 705         # but REJECT/DROP some packages to reduce logging,
 706         # and ACCEPT critical ICMP types
 707         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 708         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 709         { action => 'PVEFW-DropBroadcast' },
 710         # ACCEPT critical ICMP types
 711         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 712         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 713         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 714         # Drop packets with INVALID state
 715         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 716         # Drop Microsoft SMB noise
 717         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 718         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
 719         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 720         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 721         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 722         # Drop new/NotSyn traffic so that it doesn't get logged
 723         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 724         # Drop DNS replies
 725         { action => 'DROP', proto => 'udp', sport => 53 },
 726     ],
 727     'PVEFW-tcpflags' => [
 728         # same as shorewall tcpflags action.
 729         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 730         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 731         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 732         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 733         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 734         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 735     ],
 736     'PVEFW-logflags' => [
 737         { action => 'DROP', logmsg => 'DROP: ' },
 738     ],
 739 };
 740
 741 # iptables -p icmp -h
 742 my $icmp_type_names = {
 743     any => 1,
 744     'echo-reply' => 1,
 745     'destination-unreachable' => 1,
 746     'network-unreachable' => 1,
 747     'host-unreachable' => 1,
 748     'protocol-unreachable' => 1,
 749     'port-unreachable' => 1,
 750     'fragmentation-needed' => 1,
 751     'source-route-failed' => 1,
 752     'network-unknown' => 1,
 753     'host-unknown' => 1,
 754     'network-prohibited' => 1,
 755     'host-prohibited' => 1,
 756     'TOS-network-unreachable' => 1,
 757     'TOS-host-unreachable' => 1,
 758     'communication-prohibited' => 1,
 759     'host-precedence-violation' => 1,
 760     'precedence-cutoff' => 1,
 761     'source-quench' => 1,
 762     'redirect' => 1,
 763     'network-redirect' => 1,
 764     'host-redirect' => 1,
 765     'TOS-network-redirect' => 1,
 766     'TOS-host-redirect' => 1,
 767     'echo-request' => 1,
 768     'router-advertisement' => 1,
 769     'router-solicitation' => 1,
 770     'time-exceeded' => 1,
 771     'ttl-zero-during-transit' => 1,
 772     'ttl-zero-during-reassembly' => 1,
 773     'parameter-problem' => 1,
 774     'ip-header-bad' => 1,
 775     'required-option-missing' => 1,
 776     'timestamp-request' => 1,
 777     'timestamp-reply' => 1,
 778     'address-mask-request' => 1,
 779     'address-mask-reply' => 1,
 780 };
 781
 782 # ip6tables -p icmpv6 -h
 783
 784 my $icmpv6_type_names = {
 785     'any' => 1,
 786     'destination-unreachable' => 1,
 787     'no-route' => 1,
 788     'communication-prohibited' => 1,
 789     'address-unreachable' => 1,
 790     'port-unreachable' => 1,
 791     'packet-too-big' => 1,
 792     'time-exceeded' => 1,
 793     'ttl-zero-during-transit' => 1,
 794     'ttl-zero-during-reassembly' => 1,
 795     'parameter-problem' => 1,
 796     'bad-header' => 1,
 797     'unknown-header-type' => 1,
 798     'unknown-option' => 1,
 799     'echo-request' => 1,
 800     'echo-reply' => 1,
 801     'router-solicitation' => 1,
 802     'router-advertisement' => 1,
 803     'neighbor-solicitation' => 1,
 804     'neighbour-solicitation' => 1,
 805     'neighbor-advertisement' => 1,
 806     'neighbour-advertisement' => 1,
 807     'redirect' => 1,
 808 };
 809
 810 sub init_firewall_macros {
 811
 812     $pve_fw_parsed_macros = {};
 813
 814     my $parse = sub {
 815         my ($k, $macro) = @_;
 816         my $lc_name = lc($k);
 817         $pve_fw_macro_ipversion->{$k} = 0;
 818         while (!ref($macro->[0])) {
 819             my $desc = shift @$macro;
 820             if ($desc eq 'ipv4only') {
 821                 $pve_fw_macro_ipversion->{$k} = 4;
 822             } elsif ($desc eq 'ipv6only') {
 823                 $pve_fw_macro_ipversion->{$k} = 6;
 824             } else {
 825                 $pve_fw_macro_descr->{$k} = $desc;
 826             }
 827         }
 828         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 829         $pve_fw_parsed_macros->{$k} = $macro;
 830     };
 831
 832     foreach my $k (keys %$pve_fw_macros) {
 833         &$parse($k, $pve_fw_macros->{$k});
 834     }
 835
 836     foreach my $k (keys %$pve_ipv6fw_macros) {
 837         next if $pve_fw_parsed_macros->{$k};
 838         &$parse($k, $pve_ipv6fw_macros->{$k});
 839         $pve_fw_macro_ipversion->{$k} = 6;
 840     }
 841 }
 842
 843 init_firewall_macros();
 844
 845 sub get_macros {
 846     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 847 }
 848
 849 my $etc_services;
 850
 851 sub get_etc_services {
 852
 853     return $etc_services if $etc_services;
 854
 855     my $filename = "/etc/services";
 856
 857     my $fh = IO::File->new($filename, O_RDONLY);
 858     if (!$fh) {
 859         warn "unable to read '$filename' - $!\n";
 860         return {};
 861     }
 862
 863     my $services = {};
 864
 865     while (my $line = <$fh>) {
 866         chomp ($line);
 867         next if $line =~m/^#/;
 868         next if ($line =~m/^\s*$/);
 869
 870         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
 871             $services->{byid}->{$2}->{name} = $1;
 872             $services->{byid}->{$2}->{port} = $2;
 873             $services->{byid}->{$2}->{$3} = 1;
 874             $services->{byname}->{$1} = $services->{byid}->{$2};
 875         }
 876     }
 877
 878     close($fh);
 879
 880     $etc_services = $services;
 881
 882
 883     return $etc_services;
 884 }
 885
 886 sub parse_protocol_file {
 887     my ($filename) = @_;
 888
 889     my $fh = IO::File->new($filename, O_RDONLY);
 890     if (!$fh) {
 891         warn "unable to read '$filename' - $!\n";
 892         return {};
 893     }
 894
 895     my $protocols = {};
 896
 897     while (my $line = <$fh>) {
 898         chomp ($line);
 899         next if $line =~m/^#/;
 900         next if ($line =~m/^\s*$/);
 901
 902         if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
 903             $protocols->{byid}->{$2}->{name} = $1;
 904             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 905         }
 906     }
 907
 908     close($fh);
 909
 910     return $protocols;
 911 }
 912
 913 my $etc_protocols;
 914
 915 sub get_etc_protocols {
 916     return $etc_protocols if $etc_protocols;
 917
 918     my $protocols = parse_protocol_file('/etc/protocols');
 919
 920     # add special case for ICMP v6
 921     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 922     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 923
 924     $etc_protocols = $protocols;
 925
 926     return $etc_protocols;
 927 }
 928
 929 my $etc_ethertypes;
 930
 931 sub get_etc_ethertypes {
 932     $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
 933         if !$etc_ethertypes;
 934     return $etc_ethertypes;
 935 }
 936
 937 my $__local_network;
 938
 939 sub local_network {
 940     my ($new_value) = @_;
 941
 942     $__local_network = $new_value if defined($new_value);
 943
 944     return $__local_network if defined($__local_network);
 945
 946     eval {
 947         my $nodename = PVE::INotify::nodename();
 948
 949         my $ip = PVE::Cluster::remote_node_ip($nodename);
 950
 951         my $testip = Net::IP->new($ip);
 952
 953         my $isv6 = $testip->version == 6;
 954         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 955                            : PVE::ProcFSTools::read_proc_net_route();
 956         foreach my $entry (@$routes) {
 957             my $mask;
 958             if ($isv6) {
 959                 $mask = $entry->{prefix};
 960                 next if !$mask; # skip the default route...
 961             } else {
 962                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 963                 next if !defined($mask);
 964             }
 965             my $cidr = "$entry->{dest}/$mask";
 966             my $testnet = Net::IP->new($cidr);
 967             my $overlap = $testnet->overlaps($testip);
 968             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
 969                 $overlap == $Net::IP::IP_IDENTICAL)
 970             {
 971                 $__local_network = $cidr;
 972                 return;
 973             }
 974         }
 975     };
 976     warn $@ if $@;
 977
 978     return $__local_network;
 979 }
 980
 981 # ipset names are limited to 31 characters,
 982 # and we use '-v4' or '-v6' to indicate IP versions,
 983 # and we use '_swap' suffix for atomic update,
 984 # for example PVEFW-${VMID}-${ipset_name}_swap
 985
 986 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 987
 988 sub compute_ipset_chain_name {
 989     my ($vmid, $ipset_name, $ipversion) = @_;
 990
 991     $vmid = 0 if !defined($vmid);
 992
 993     my $id = "$vmid-${ipset_name}-v$ipversion";
 994
 995     if (length($id) > $max_iptables_ipset_name_length) {
 996         $id = PVE::Tools::fnv31a_hex($id);
 997     }
 998
 999     return "PVEFW-$id";
1000 }
1001
1002 sub compute_ipfilter_ipset_name {
1003     my ($iface) = @_;
1004
1005     return "ipfilter-$iface";
1006 }
1007
1008 sub parse_address_list {
1009     my ($str) = @_;
1010
1011     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1012         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1013         return;
1014     }
1015
1016     if ($str =~ m/^${ip_alias_pattern}$/) {
1017         die "alias name too long\n" if length($str) > $max_alias_name_length;
1018         return;
1019     }
1020
1021     my $count = 0;
1022     my $iprange = 0;
1023     my $ipversion;
1024
1025     my @elements = split(/,/, $str);
1026     die "extraneous commas in list\n" if $str ne join(',', @elements);
1027     foreach my $elem (@elements) {
1028         $count++;
1029         my $ip = Net::IP->new($elem);
1030         if (!$ip) {
1031             my $err = Net::IP::Error();
1032             die "invalid IP address: $err\n";
1033         }
1034         $iprange = 1 if $elem =~ m/-/;
1035
1036         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1037
1038         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1039             if $ipversion && ($new_ipversion != $ipversion);
1040
1041         $ipversion = $new_ipversion;
1042     }
1043
1044     die "you can't use a range in a list\n" if $iprange && $count > 1;
1045
1046     return $ipversion;
1047 }
1048
1049 sub parse_port_name_number_or_range {
1050     my ($str, $dport) = @_;
1051
1052     my $services = PVE::Firewall::get_etc_services();
1053     my $count = 0;
1054     my $icmp_port = 0;
1055
1056     my @elements = split(/,/, $str);
1057     die "extraneous commas in list\n" if $str ne join(',', @elements);
1058     foreach my $item (@elements) {
1059         if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1060             $count += 2;
1061             my ($port1, $port2) = ($1, $2);
1062             die "invalid port '$port1'\n" if $port1 > 65535;
1063             die "invalid port '$port2'\n" if $port2 > 65535;
1064             die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1065         } elsif ($item =~ m/^([0-9]+)$/) {
1066             $count += 1;
1067             my $port = $1;
1068             die "invalid port '$port'\n" if $port > 65535;
1069         } else {
1070             if ($dport && $icmp_type_names->{$item}) {
1071                 $icmp_port = 1;
1072             } elsif ($dport && $icmpv6_type_names->{$item}) {
1073                 $icmp_port = 1;
1074             } else {
1075                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1076             }
1077         }
1078     }
1079
1080     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1081
1082     # I really don't like to use the word number here, but it's the only thing
1083     # that makes sense in a literal way. The range 1:100 counts as 2, not as
1084     # one and not as 100...
1085     die "too many entries in port list (> 15 numbers)\n"
1086         if $count > 15;
1087
1088     return (scalar(@elements) > 1);
1089 }
1090
1091 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1092 sub pve_fw_verify_sport_spec {
1093    my ($portstr) = @_;
1094
1095    parse_port_name_number_or_range($portstr, 0);
1096
1097    return $portstr;
1098 }
1099
1100 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1101 sub pve_fw_verify_dport_spec {
1102    my ($portstr) = @_;
1103
1104    parse_port_name_number_or_range($portstr, 1);
1105
1106    return $portstr;
1107 }
1108
1109 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1110 sub pve_fw_verify_addr_spec {
1111    my ($list) = @_;
1112
1113    parse_address_list($list);
1114
1115    return $list;
1116 }
1117
1118 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1119 sub pve_fw_verify_protocol_spec {
1120    my ($proto) = @_;
1121
1122    my $protocols = get_etc_protocols();
1123
1124    die "unknown protocol '$proto'\n" if $proto &&
1125        !(defined($protocols->{byname}->{$proto}) ||
1126          defined($protocols->{byid}->{$proto}));
1127
1128    return $proto;
1129 }
1130
1131
1132 # helper function for API
1133
1134 sub copy_opject_with_digest {
1135     my ($object) = @_;
1136
1137     my $sha = Digest::SHA->new('sha1');
1138
1139     my $res = {};
1140     foreach my $k (sort keys %$object) {
1141         my $v = $object->{$k};
1142         next if !defined($v);
1143         $res->{$k} = $v;
1144         $sha->add($k, ':', $v, "\n");
1145     }
1146
1147     my $digest = $sha->hexdigest;
1148
1149     $res->{digest} = $digest;
1150
1151     return wantarray ? ($res, $digest) : $res;
1152 }
1153
1154 sub copy_list_with_digest {
1155     my ($list) = @_;
1156
1157     my $sha = Digest::SHA->new('sha1');
1158
1159     my $res = [];
1160     foreach my $entry (@$list) {
1161         my $data = {};
1162         foreach my $k (sort keys %$entry) {
1163             my $v = $entry->{$k};
1164             next if !defined($v);
1165             $data->{$k} = $v;
1166             # Note: digest ignores refs ($rule->{errors})
1167             # since Digest::SHA expects a series of bytes,
1168             #  we have to encode the value here to prevent errors when
1169             #  using utf8 characters (eg. in comments)
1170             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1171         }
1172         push @$res, $data;
1173     }
1174
1175     my $digest = $sha->hexdigest;
1176
1177     foreach my $entry (@$res) {
1178         $entry->{digest} = $digest;
1179     }
1180
1181     return wantarray ? ($res, $digest) : $res;
1182 }
1183
1184 our $cluster_option_properties = {
1185     enable => {
1186         description => "Enable or disable the firewall cluster wide.",
1187         type => 'integer',
1188         minimum => 0,
1189         optional => 1,
1190     },
1191     ebtables => {
1192         description => "Enable ebtables rules cluster wide.",
1193         type => 'boolean',
1194         default => 1,
1195         optional => 1,
1196     },
1197     policy_in => {
1198         description => "Input policy.",
1199         type => 'string',
1200         optional => 1,
1201         enum => ['ACCEPT', 'REJECT', 'DROP'],
1202     },
1203     policy_out => {
1204         description => "Output policy.",
1205         type => 'string',
1206         optional => 1,
1207         enum => ['ACCEPT', 'REJECT', 'DROP'],
1208     },
1209     log_ratelimit => {
1210         description => "Log ratelimiting settings",
1211         type => 'string', format => {
1212             enable => {
1213                 default_key => 1,
1214                 description => 'Enable or disable log rate limiting',
1215                 type => 'boolean',
1216                 default => '1',
1217             },
1218             rate => {
1219                 type => 'string',
1220                 description => 'Frequency with which the burst bucket gets refilled',
1221                 optional => 1,
1222                 pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
1223                 format_description => 'rate',
1224                 default => '1/second',
1225             },
1226             burst => {
1227                 type => 'integer',
1228                 minimum => 0,
1229                 optional => 1,
1230                 description => 'Inital burst of packages which will get logged',
1231                 default => 5,
1232             },
1233         },
1234         optional => 1,
1235     },
1236 };
1237
1238 our $host_option_properties = {
1239     enable => {
1240         description => "Enable host firewall rules.",
1241         type => 'boolean',
1242         optional => 1,
1243     },
1244     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1245         description => "Log level for incoming traffic." }),
1246     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1247         description => "Log level for outgoing traffic." }),
1248     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1249         description => "Log level for illegal tcp flags filter." }),
1250     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1251         description => "Log level for SMURFS filter." }),
1252     nosmurfs => {
1253         description => "Enable SMURFS filter.",
1254         type => 'boolean',
1255         optional => 1,
1256     },
1257     tcpflags => {
1258         description => "Filter illegal combinations of TCP flags.",
1259         type => 'boolean',
1260         optional => 1,
1261     },
1262     nf_conntrack_max => {
1263         description => "Maximum number of tracked connections.",
1264         type => 'integer',
1265         optional => 1,
1266         minimum => 32768,
1267     },
1268     nf_conntrack_tcp_timeout_established => {
1269         description => "Conntrack established timeout.",
1270         type => 'integer',
1271         optional => 1,
1272         minimum => 7875,
1273     },
1274     ndp => {
1275         description => "Enable NDP.",
1276         type => 'boolean',
1277         optional => 1,
1278     },
1279     nf_conntrack_allow_invalid => {
1280         description => "Allow invalid packets on connection tracking.",
1281         type => 'boolean',
1282         default => 0,
1283         optional => 1,
1284     },
1285     log_nf_conntrack => {
1286         description => "Enable logging of conntrack information.",
1287         type => 'boolean',
1288         default => 0,
1289         optional => 1
1290     },
1291 };
1292
1293 our $vm_option_properties = {
1294     enable => {
1295         description => "Enable/disable firewall rules.",
1296         type => 'boolean',
1297         optional => 1,
1298     },
1299     macfilter => {
1300         description => "Enable/disable MAC address filter.",
1301         type => 'boolean',
1302         optional => 1,
1303     },
1304     dhcp => {
1305         description => "Enable DHCP.",
1306         type => 'boolean',
1307         optional => 1,
1308     },
1309     ndp => {
1310         description => "Enable NDP.",
1311         type => 'boolean',
1312         optional => 1,
1313     },
1314     radv => {
1315         description => "Allow sending Router Advertisement.",
1316         type => 'boolean',
1317         optional => 1,
1318     },
1319     ipfilter => {
1320         description => "Enable default IP filters. " .
1321            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1322            "for every interface. Such ipsets implicitly contain sane default " .
1323            "restrictions such as restricting IPv6 link local addresses to " .
1324            "the one derived from the interface's MAC address. For containers " .
1325            "the configured IP addresses will be implicitly added.",
1326         type => 'boolean',
1327         optional => 1,
1328     },
1329     policy_in => {
1330         description => "Input policy.",
1331         type => 'string',
1332         optional => 1,
1333         enum => ['ACCEPT', 'REJECT', 'DROP'],
1334     },
1335     policy_out => {
1336         description => "Output policy.",
1337         type => 'string',
1338         optional => 1,
1339         enum => ['ACCEPT', 'REJECT', 'DROP'],
1340     },
1341     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1342         description => "Log level for incoming traffic." }),
1343     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1344         description => "Log level for outgoing traffic." }),
1345
1346 };
1347
1348
1349 my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
1350
1351 my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
1352
1353 my $rule_properties = {
1354     pos => {
1355         description => "Update rule at position <pos>.",
1356         type => 'integer',
1357         minimum => 0,
1358         optional => 1,
1359     },
1360     digest => get_standard_option('pve-config-digest'),
1361     type => {
1362         description => "Rule type.",
1363         type => 'string',
1364         optional => 1,
1365         enum => ['in', 'out', 'group'],
1366     },
1367     action => {
1368         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1369         type => 'string',
1370         optional => 1,
1371         pattern => $security_group_name_pattern,
1372         maxLength => 20,
1373         minLength => 2,
1374     },
1375     macro => {
1376         description => "Use predefined standard macro.",
1377         type => 'string',
1378         optional => 1,
1379         maxLength => 128,
1380     },
1381     iface => get_standard_option('pve-iface', {
1382         description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
1383         optional => 1
1384     }),
1385     source => {
1386         description => "Restrict packet source address. $addr_list_descr",
1387         type => 'string', format => 'pve-fw-addr-spec',
1388         optional => 1,
1389     },
1390     dest => {
1391         description => "Restrict packet destination address. $addr_list_descr",
1392         type => 'string', format => 'pve-fw-addr-spec',
1393         optional => 1,
1394     },
1395     proto => {
1396         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1397         type => 'string', format => 'pve-fw-protocol-spec',
1398         optional => 1,
1399     },
1400     enable => {
1401         description => "Flag to enable/disable a rule.",
1402         type => 'integer',
1403         minimum => 0,
1404         optional => 1,
1405     },
1406     log => get_standard_option('pve-fw-loglevel', {
1407         description => "Log level for firewall rule.",
1408     }),
1409     sport => {
1410         description => "Restrict TCP/UDP source port. $port_descr",
1411         type => 'string', format => 'pve-fw-sport-spec',
1412         optional => 1,
1413     },
1414     dport => {
1415         description => "Restrict TCP/UDP destination port. $port_descr",
1416         type => 'string', format => 'pve-fw-dport-spec',
1417         optional => 1,
1418     },
1419     comment => {
1420         description => "Descriptive comment.",
1421         type => 'string',
1422         optional => 1,
1423     },
1424 };
1425
1426 sub add_rule_properties {
1427     my ($properties) = @_;
1428
1429     foreach my $k (keys %$rule_properties) {
1430         my $h = $rule_properties->{$k};
1431         # copy data, so that we can modify later without side effects
1432         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1433     }
1434
1435     return $properties;
1436 }
1437
1438 sub delete_rule_properties {
1439     my ($rule, $delete_str) = @_;
1440
1441     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1442         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1443             if !defined($rule_properties->{$opt});
1444         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1445             if $opt eq 'type' || $opt eq 'action';
1446         delete $rule->{$opt};
1447     }
1448
1449     return $rule;
1450 }
1451
1452 my $apply_macro = sub {
1453     my ($macro_name, $param, $verify, $ipversion) = @_;
1454
1455     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1456     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1457
1458     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1459         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1460     }
1461
1462     # skip macros which are specific to another ipversion
1463     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1464         return if $ipversion != $required;
1465     }
1466
1467     my $rules = [];
1468
1469     foreach my $templ (@$macro_rules) {
1470         my $rule = {};
1471         my $param_used = {};
1472         foreach my $k (keys %$templ) {
1473             my $v = $templ->{$k};
1474             if ($v eq 'PARAM') {
1475                 $v = $param->{$k};
1476                 $param_used->{$k} = 1;
1477             } elsif ($v eq 'DEST') {
1478                 $v = $param->{dest};
1479                 $param_used->{dest} = 1;
1480             } elsif ($v eq 'SOURCE') {
1481                 $v = $param->{source};
1482                 $param_used->{source} = 1;
1483             }
1484
1485             if (!defined($v)) {
1486                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1487                 raise_param_exc({ macro => $msg }) if $verify;
1488                 die "$msg\n";
1489             }
1490             $rule->{$k} = $v;
1491         }
1492         foreach my $k (keys %$param) {
1493             next if $k eq 'macro';
1494             next if !defined($param->{$k});
1495             next if $param_used->{$k};
1496             if (defined($rule->{$k})) {
1497                 if ($rule->{$k} ne $param->{$k}) {
1498                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1499                     raise_param_exc({ $k => $msg }) if $verify;
1500                     die "$msg\n";
1501                 }
1502             } else {
1503                 $rule->{$k} = $param->{$k};
1504             }
1505         }
1506         push @$rules, $rule;
1507     }
1508
1509     return $rules;
1510 };
1511
1512 my $rule_env_iface_lookup = {
1513     'ct' => 1,
1514     'vm' => 1,
1515     'group' => 0,
1516     'cluster' => 1,
1517     'host' => 1,
1518 };
1519
1520 sub verify_rule {
1521     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1522
1523     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1524
1525     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1526     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1527
1528     my $errors = $rule->{errors} || {};
1529
1530     my $error_count = 0;
1531
1532     my $add_error = sub {
1533         my ($param, $msg)  = @_;
1534         chomp $msg;
1535         raise_param_exc({ $param => $msg }) if !$noerr;
1536         $error_count++;
1537         $errors->{$param} = $msg if !$errors->{$param};
1538     };
1539
1540     my $ipversion;
1541     my $set_ip_version = sub {
1542         my $vers = shift;
1543         if ($vers) {
1544             die "detected mixed ipv4/ipv6 adresses in rule\n"
1545                 if $ipversion && ($vers != $ipversion);
1546             $ipversion = $vers;
1547         }
1548     };
1549
1550     my $check_ipset_or_alias_property = sub {
1551         my ($name, $expected_ipversion) = @_;
1552
1553         if (my $value = $rule->{$name}) {
1554             if ($value =~ m/^\+/) {
1555                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1556                     &$add_error($name, "no such ipset '$1'")
1557                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1558
1559                 } else {
1560                     &$add_error($name, "invalid ipset name '$value'");
1561                 }
1562             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1563                 my $alias = lc($value);
1564                 &$add_error($name, "no such alias '$value'")
1565                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1566                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1567                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1568
1569                 &$set_ip_version($e->{ipversion});
1570             }
1571         }
1572     };
1573
1574     my $type = $rule->{type};
1575     my $action = $rule->{action};
1576
1577     &$add_error('type', "missing property") if !$type;
1578     &$add_error('action', "missing property") if !$action;
1579
1580     if ($type) {
1581         if ($type eq  'in' || $type eq 'out') {
1582             &$add_error('action', "unknown action '$action'")
1583                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1584         } elsif ($type eq 'group') {
1585             &$add_error('type', "security groups not allowed")
1586                 if !$allow_groups;
1587             &$add_error('action', "invalid characters in security group name")
1588                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1589         } else {
1590             &$add_error('type', "unknown rule type '$type'");
1591         }
1592     }
1593
1594     if ($rule->{iface}) {
1595         &$add_error('type', "parameter -i not allowed for this rule type")
1596             if !$allow_iface;
1597         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1598         &$add_error('iface', $@) if $@;
1599         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1600             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1601                 if $rule->{iface} !~  m/^net(\d+)$/;
1602         }
1603     }
1604
1605     if ($rule->{macro}) {
1606         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1607             $rule->{macro} = $preferred_name;
1608         } else {
1609             &$add_error('macro', "unknown macro '$rule->{macro}'");
1610         }
1611     }
1612
1613     if ($rule->{proto}) {
1614         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1615         &$add_error('proto', $@) if $@;
1616         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1617         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1618     }
1619
1620     if ($rule->{dport}) {
1621         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1622         &$add_error('dport', $@) if $@;
1623         my $proto = $rule->{proto};
1624         &$add_error('proto', "missing property - 'dport' requires this property")
1625             if !$proto;
1626         &$add_error('dport', "protocol '$proto' does not support ports")
1627             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1628                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1629     }
1630
1631     if ($rule->{sport}) {
1632         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1633         &$add_error('sport', $@) if $@;
1634         my $proto = $rule->{proto};
1635         &$add_error('proto', "missing property - 'sport' requires this property")
1636             if !$proto;
1637         &$add_error('sport', "protocol '$proto' does not support ports")
1638             if !$PROTOCOLS_WITH_PORTS->{$proto};
1639     }
1640
1641     if ($rule->{source}) {
1642         eval {
1643             my $source_ipversion = parse_address_list($rule->{source});
1644             &$set_ip_version($source_ipversion);
1645         };
1646         &$add_error('source', $@) if $@;
1647         &$check_ipset_or_alias_property('source', $ipversion);
1648     }
1649
1650     if ($rule->{dest}) {
1651         eval {
1652             my $dest_ipversion = parse_address_list($rule->{dest});
1653             &$set_ip_version($dest_ipversion);
1654         };
1655         &$add_error('dest', $@) if $@;
1656         &$check_ipset_or_alias_property('dest', $ipversion);
1657     }
1658
1659     $rule->{ipversion} = $ipversion if $ipversion;
1660
1661     if ($rule->{macro} && !$error_count) {
1662         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1663         if (my $err = $@) {
1664             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1665                 my $eh = $err->{errors};
1666                 foreach my $p (keys %$eh) {
1667                     &$add_error($p, $eh->{$p});
1668                 }
1669             } else {
1670                 &$add_error('macro', "$err");
1671             }
1672         }
1673     }
1674
1675     $rule->{errors} = $errors if $error_count;
1676
1677     return $rule;
1678 }
1679
1680 sub copy_rule_data {
1681     my ($rule, $param) = @_;
1682
1683     foreach my $k (keys %$rule_properties) {
1684         if (defined(my $v = $param->{$k})) {
1685             if ($v eq '' || $v eq '-') {
1686                 delete $rule->{$k};
1687             } else {
1688                 $rule->{$k} = $v;
1689             }
1690         }
1691     }
1692
1693     return $rule;
1694 }
1695
1696 sub rules_modify_permissions {
1697     my ($rule_env) = @_;
1698
1699     if ($rule_env eq 'host') {
1700         return {
1701             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1702         };
1703     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1704         return {
1705             check => ['perm', '/', [ 'Sys.Modify' ]],
1706         };
1707     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1708         return {
1709             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1710         }
1711     }
1712
1713     return undef;
1714 }
1715
1716 sub rules_audit_permissions {
1717     my ($rule_env) = @_;
1718
1719     if ($rule_env eq 'host') {
1720         return {
1721             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1722         };
1723     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1724         return {
1725             check => ['perm', '/', [ 'Sys.Audit' ]],
1726         };
1727     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1728         return {
1729             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1730         }
1731     }
1732
1733     return undef;
1734 }
1735
1736 # core functions
1737 my $bridge_firewall_enabled = 0;
1738
1739 sub enable_bridge_firewall {
1740
1741     return if $bridge_firewall_enabled; # only once
1742
1743     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1744     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1745
1746     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1747     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1748
1749     $bridge_firewall_enabled = 1;
1750 }
1751
1752 sub iptables_restore_cmdlist {
1753     my ($cmdlist) = @_;
1754
1755     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1756 }
1757
1758 sub ip6tables_restore_cmdlist {
1759     my ($cmdlist) = @_;
1760
1761     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1762 }
1763
1764 sub ipset_restore_cmdlist {
1765     my ($cmdlist) = @_;
1766
1767     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1768 }
1769
1770 sub ebtables_restore_cmdlist {
1771     my ($cmdlist) = @_;
1772
1773     run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1774 }
1775
1776 sub iptables_get_chains {
1777     my ($iptablescmd) = @_;
1778
1779     $iptablescmd = "iptables" if !$iptablescmd;
1780
1781     my $res = {};
1782
1783     # check what chains we want to track
1784     my $is_pvefw_chain = sub {
1785         my $name = shift;
1786
1787         return 1 if $name =~ m/^PVEFW-\S+$/;
1788
1789         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1790
1791         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1792
1793         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1794         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1795
1796         return undef;
1797     };
1798
1799     my $table = '';
1800
1801     my $hooks = {};
1802
1803     my $parser = sub {
1804         my $line = shift;
1805
1806         return if $line =~ m/^#/;
1807         return if $line =~ m/^\s*$/;
1808
1809         if ($line =~ m/^\*(\S+)$/) {
1810             $table = $1;
1811             return;
1812         }
1813
1814         return if $table ne 'filter';
1815
1816         if ($line =~ m/^:(\S+)\s/) {
1817             my $chain = $1;
1818             return if !&$is_pvefw_chain($chain);
1819             $res->{$chain} = "unknown";
1820         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1821             my ($chain, $sig) = ($1, $2);
1822             return if !&$is_pvefw_chain($chain);
1823             $res->{$chain} = $sig;
1824         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1825             $hooks->{$1} = 1;
1826         } else {
1827             # simply ignore the rest
1828             return;
1829         }
1830     };
1831
1832     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1833
1834     return wantarray ? ($res, $hooks) : $res;
1835 }
1836
1837 sub iptables_chain_digest {
1838     my ($rules) = @_;
1839     my $digest = Digest::SHA->new('sha1');
1840     foreach my $rule (@$rules) { # order is important
1841         $digest->add($rule);
1842     }
1843     return $digest->b64digest;
1844 }
1845
1846 sub ipset_chain_digest {
1847     my ($rules) = @_;
1848
1849     my $digest = Digest::SHA->new('sha1');
1850     foreach my $rule (sort @$rules) { # note: sorted
1851         $digest->add($rule);
1852     }
1853     return $digest->b64digest;
1854 }
1855
1856 sub ipset_get_chains {
1857
1858     my $res = {};
1859     my $chains = {};
1860
1861     my $parser = sub {
1862         my $line = shift;
1863
1864         return if $line =~ m/^#/;
1865         return if $line =~ m/^\s*$/;
1866         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1867             my $chain = $1;
1868             $line =~ s/\s+$//; # delete trailing white space
1869             push @{$chains->{$chain}}, $line;
1870         } else {
1871             # simply ignore the rest
1872             return;
1873         }
1874     };
1875
1876     run_command("/sbin/ipset save", outfunc => $parser);
1877
1878     # compute digest for each chain
1879     foreach my $chain (keys %$chains) {
1880         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1881     }
1882
1883     return $res;
1884 }
1885
1886 sub ebtables_get_chains {
1887
1888     my $res = {};
1889     my $chains = {};
1890     my $parser = sub {
1891         my $line = shift;
1892         return if $line =~ m/^#/;
1893         return if $line =~ m/^\s*$/;
1894         if ($line =~ m/^:(\S+)\s\S+$/) {
1895             # Make sure we know chains exist even if they're empty.
1896             $chains->{$1} //= [];
1897         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1898             my $chain = $1;
1899             $line =~ s/\s+$//;
1900             push @{$chains->{$chain}}, $line;
1901         } else {
1902             # simply ignore the rest
1903             return;
1904         }
1905     };
1906
1907     run_command("/sbin/ebtables-save", outfunc => $parser);
1908     # compute digest for each chain and store rules as well
1909     foreach my $chain (keys %$chains) {
1910         $res->{$chain}->{rules} = $chains->{$chain};
1911         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1912     }
1913     return $res;
1914 }
1915
1916 # substitude action of rule according to action hash
1917 sub rule_substitude_action {
1918     my ($rule, $actions) = @_;
1919
1920     if (my $action = $rule->{action}) {
1921         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1922     }
1923 }
1924
1925 # generate a src or dst match
1926 # $dir(ection) is either d or s
1927 sub ipt_gen_src_or_dst_match {
1928     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1929
1930     my $srcdst;
1931     if ($dir eq 's') {
1932         $srcdst = "src";
1933     } elsif ($dir eq 'd') {
1934         $srcdst = "dst";
1935     } else {
1936         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1937     }
1938
1939     my $match;
1940     if ($adr =~ m/^\+/) {
1941         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1942             my $name = $1;
1943             my $ipset_chain;
1944             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1945                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1946             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1947                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1948             } else {
1949                 die "no such ipset '$name'\n";
1950             }
1951             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1952         } else {
1953             die "invalid security group name '$adr'\n";
1954         }
1955     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1956         my $alias = lc($adr);
1957         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1958         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1959         die "no such alias '$adr'\n" if !$e;
1960         $match = "-${dir} $e->{cidr}";
1961     } elsif ($adr =~ m/\-/){
1962         $match = "-m iprange --${srcdst}-range $adr";
1963     } else {
1964         $match = "-${dir} $adr";
1965     }
1966
1967     return $match;
1968 }
1969
1970 # convert a %rule to an array of iptables commands
1971 sub ipt_rule_to_cmds {
1972     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1973
1974     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1975
1976     my @match = ();
1977
1978     if (defined $rule->{match}) {
1979         push @match, $rule->{match};
1980     } else {
1981         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1982         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1983
1984         if ($rule->{source}) {
1985             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1986         }
1987         if ($rule->{dest}) {
1988             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1989         }
1990
1991         if (my $proto = $rule->{proto}) {
1992             push @match, "-p $proto";
1993
1994             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1995             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1996
1997             my $add_dport = sub {
1998                 return if !$rule->{dport};
1999
2000                 if ($proto eq 'icmp') {
2001                     # Note: we use dport to store --icmp-type
2002                     die "unknown icmp-type '$rule->{dport}'\n"
2003                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
2004                     push @match, "-m icmp --icmp-type $rule->{dport}";
2005                 } elsif ($proto eq 'icmpv6') {
2006                     # Note: we use dport to store --icmpv6-type
2007                     die "unknown icmpv6-type '$rule->{dport}'\n"
2008                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
2009                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2010                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2011                     die "protocol $proto does not have ports\n";
2012                 } elsif ($multidport) {
2013                     push @match, "--match multiport", "--dports $rule->{dport}";
2014                 } else {
2015                     push @match, "--dport $rule->{dport}";
2016                 }
2017             };
2018
2019             my $add_sport = sub {
2020                 return if !$rule->{sport};
2021
2022                 die "protocol $proto does not have ports\n"
2023                     if !$PROTOCOLS_WITH_PORTS->{$proto};
2024                 if ($multisport) {
2025                     push @match, "--match multiport", "--sports $rule->{sport}";
2026                 } else {
2027                     push @match, "--sport $rule->{sport}";
2028                 }
2029             };
2030
2031             # order matters - single port before multiport!
2032             $add_dport->() if $multisport;
2033             $add_sport->();
2034             $add_dport->() if !$multisport;
2035         } elsif ($rule->{dport} || $rule->{sport}) {
2036             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2037             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2038         }
2039
2040         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2041     }
2042     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2043
2044     my $targetstr;
2045     if (defined $rule->{target}) {
2046         $targetstr = $rule->{target};
2047     } else {
2048         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2049         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2050         $targetstr = ($goto) ? "-g $action" : "-j $action";
2051     }
2052
2053     my @iptcmds;
2054     my $log = $rule->{log};
2055     if (defined($log) && $log ne 'nolog') {
2056         my $loglevel = $log_level_hash->{$log};
2057         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2058         push @iptcmds, "-A $chain $matchstr $logaction";
2059     }
2060     push @iptcmds, "-A $chain $matchstr $targetstr";
2061     return @iptcmds;
2062 }
2063
2064 sub ruleset_generate_rule {
2065     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2066
2067     my $rules;
2068
2069     if ($rule->{macro}) {
2070         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2071     } else {
2072         $rules = [ $rule ];
2073     }
2074
2075     # update all or nothing
2076     my @ipt_rule_cmds;
2077     foreach my $r (@$rules) {
2078         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2079     }
2080     foreach my $c (@ipt_rule_cmds) {
2081         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2082     }
2083 }
2084
2085 sub ruleset_create_chain {
2086     my ($ruleset, $chain) = @_;
2087
2088     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2089     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2090
2091     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2092
2093     $ruleset->{$chain} = [];
2094 }
2095
2096 sub ruleset_chain_exist {
2097     my ($ruleset, $chain) = @_;
2098
2099     return $ruleset->{$chain} ? 1 : undef;
2100 }
2101
2102 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2103 sub ruleset_add_ipt_cmd {
2104    my ($ruleset, $chain, $iptcmd) = @_;
2105
2106    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2107
2108    push @{$ruleset->{$chain}}, $iptcmd;
2109 }
2110
2111 sub ruleset_addrule {
2112     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2113
2114     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2115
2116     if ($log) {
2117         my $loglevel = $log_level_hash->{$log};
2118         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2119         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2120     }
2121     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2122     $match .= ' ' if length($match);
2123     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2124 }
2125
2126 sub ruleset_insertrule {
2127    my ($ruleset, $chain, $match, $action, $log) = @_;
2128
2129    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2130
2131    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2132 }
2133
2134 sub get_log_rule_base {
2135     my ($chain, $vmid, $msg, $loglevel) = @_;
2136
2137     $vmid = 0 if !defined($vmid);
2138     $msg = "" if !defined($msg);
2139
2140     my $rlimit = '';
2141     if (defined($global_log_ratelimit)) {
2142         $rlimit = "-m limit $global_log_ratelimit ";
2143     }
2144
2145     # Note: we use special format for prefix to pass further
2146     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2147     return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2148 }
2149
2150 sub ruleset_add_chain_policy {
2151     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2152
2153     if ($policy eq 'ACCEPT') {
2154
2155         my $rule = { action => 'ACCEPT' };
2156         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2157         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2158
2159     } elsif ($policy eq 'DROP') {
2160
2161         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2162
2163         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2164     } elsif ($policy eq 'REJECT') {
2165         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2166
2167         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2168     } else {
2169         # should not happen
2170         die "internal error: unknown policy '$policy'";
2171     }
2172 }
2173
2174 sub ruleset_chain_add_ndp {
2175     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2176     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2177
2178     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2179     if ($direction ne 'OUT' || $options->{radv}) {
2180         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2181     }
2182     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2183     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2184 }
2185
2186 sub ruleset_chain_add_conn_filters {
2187     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2188
2189     if (!$allow_invalid) {
2190         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2191     }
2192     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2193 }
2194
2195 sub ruleset_chain_add_input_filters {
2196     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2197
2198     if ($cluster_conf->{ipset}->{blacklist}){
2199         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2200             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2201             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2202         }
2203         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2204         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2205     }
2206
2207     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2208         if ($ipversion == 4) {
2209             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2210         }
2211     }
2212
2213     if ($options->{tcpflags}) {
2214         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2215     }
2216 }
2217
2218 sub ruleset_create_vm_chain {
2219     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2220
2221     ruleset_create_chain($ruleset, $chain);
2222     my $accept = generate_nfqueue($options);
2223
2224     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2225         if ($ipversion == 4) {
2226             if ($direction eq 'OUT') {
2227                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2228                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2229                                         proto => 'udp', sport => 68, dport => 67 });
2230             } else {
2231                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2232                                       { action => 'ACCEPT',
2233                                         proto => 'udp', sport => 67, dport => 68 });
2234             }
2235         } elsif ($ipversion == 6) {
2236             if ($direction eq 'OUT') {
2237                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2238                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2239                                         proto => 'udp', sport => 546, dport => 547 });
2240             } else {
2241                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2242                                       { action => 'ACCEPT',
2243                                         proto => 'udp', sport => 547, dport => 546 });
2244             }
2245         }
2246
2247     }
2248
2249     if ($direction eq 'OUT') {
2250         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2251             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2252         }
2253         if ($ipversion == 6 && !$options->{radv}) {
2254             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2255         }
2256         if ($ipfilter_ipset) {
2257             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2258         }
2259         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2260     }
2261
2262     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2263     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2264 }
2265
2266 sub ruleset_add_group_rule {
2267     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2268
2269     my $group = $rule->{action};
2270     my $group_chain = "GROUP-$group-$direction";
2271     if(!ruleset_chain_exist($ruleset, $group_chain)){
2272         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2273     }
2274
2275     if ($direction eq 'OUT' && $rule->{iface_out}) {
2276         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2277     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2278         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2279     } else {
2280         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2281     }
2282
2283     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2284 }
2285
2286 sub ruleset_generate_vm_rules {
2287     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2288
2289     my $lc_direction = lc($direction);
2290
2291     my $in_accept = generate_nfqueue($options);
2292
2293     foreach my $rule (@$rules) {
2294         next if $rule->{iface} && $rule->{iface} ne $netid;
2295         next if !$rule->{enable} || $rule->{errors};
2296         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2297
2298         if ($rule->{type} eq 'group') {
2299             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2300                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2301         } else {
2302             next if $rule->{type} ne $lc_direction;
2303             eval {
2304                 $rule->{logmsg} = "$rule->{action}: ";
2305                 if ($direction eq 'OUT') {
2306                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2307                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2308                 } else {
2309                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2310                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2311                 }
2312             };
2313             warn $@ if $@;
2314         }
2315     }
2316 }
2317
2318 sub generate_nfqueue {
2319     my ($options) = @_;
2320
2321     if ($options->{ips}) {
2322         my $action = "NFQUEUE";
2323         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2324             if (defined($3) && defined($1)) {
2325                 $action .= " --queue-balance $1:$3";
2326             } elsif (defined($1)) {
2327                 $action .= " --queue-num $1";
2328             }
2329         }
2330         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2331         return $action;
2332     } else {
2333         return "ACCEPT";
2334     }
2335 }
2336
2337 sub ruleset_generate_vm_ipsrules {
2338     my ($ruleset, $options, $direction, $iface) = @_;
2339
2340     if ($options->{ips} && $direction eq 'IN') {
2341         my $nfqueue = generate_nfqueue($options);
2342
2343         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2344             ruleset_create_chain($ruleset, "PVEFW-IPS");
2345         }
2346
2347         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2348     }
2349 }
2350
2351 sub generate_tap_rules_direction {
2352     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2353
2354     my $lc_direction = lc($direction);
2355
2356     my $rules = $vmfw_conf->{rules};
2357
2358     my $options = $vmfw_conf->{options};
2359     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2360
2361     my $tapchain = "$iface-$direction";
2362
2363     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2364     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2365         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2366
2367     # create chain with mac and ip filter
2368     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2369
2370     if ($options->{enable}) {
2371         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2372
2373         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2374
2375         # implement policy
2376         my $policy;
2377
2378         if ($direction eq 'OUT') {
2379             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2380         } else {
2381             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2382         }
2383
2384         my $accept = generate_nfqueue($options);
2385         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2386         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2387     } else {
2388         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2389         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2390     }
2391
2392     # plug the tap chain to bridge chain
2393     if ($direction eq 'IN') {
2394         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2395                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain", $loglevel, 'FWBR-IN: ', $vmid);
2396     } else {
2397         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2398                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain", $loglevel, 'FWBR-OUT: ', $vmid);
2399     }
2400 }
2401
2402 sub enable_host_firewall {
2403     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2404
2405     my $options = $hostfw_conf->{options};
2406     my $cluster_options = $cluster_conf->{options};
2407     my $rules = $hostfw_conf->{rules};
2408     my $cluster_rules = $cluster_conf->{rules};
2409
2410     # host inbound firewall
2411     my $chain = "PVEFW-HOST-IN";
2412     ruleset_create_chain($ruleset, $chain);
2413
2414     my $loglevel = get_option_log_level($options, "log_level_in");
2415
2416     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2417
2418     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2419     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2420     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2421
2422     # we use RETURN because we need to check also tap rules
2423     my $accept_action = 'RETURN';
2424
2425     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2426
2427     # add host rules first, so that cluster wide rules can be overwritten
2428     foreach my $rule (@$rules, @$cluster_rules) {
2429         next if !$rule->{enable} || $rule->{errors};
2430         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2431
2432         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2433
2434         eval {
2435             if ($rule->{type} eq 'group') {
2436                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2437             } elsif ($rule->{type} eq 'in') {
2438                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2439                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2440             }
2441         };
2442         warn $@ if $@;
2443         delete $rule->{iface_in};
2444     }
2445
2446     # allow standard traffic for management ipset (includes cluster network)
2447     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2448     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2449     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2450     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2451     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2452     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2453
2454     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2455     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2456
2457     # corosync
2458     if ($localnet && ($ipversion == $localnet_ver)) {
2459         my $corosync_rule = "-p udp --dport 5404:5405";
2460         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2461         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2462     }
2463
2464     # implement input policy
2465     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2466     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2467
2468     # host outbound firewall
2469     $chain = "PVEFW-HOST-OUT";
2470     ruleset_create_chain($ruleset, $chain);
2471
2472     $loglevel = get_option_log_level($options, "log_level_out");
2473
2474     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2475
2476     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2477
2478     # we use RETURN because we may want to check other thigs later
2479     $accept_action = 'RETURN';
2480     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2481
2482     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2483
2484     # add host rules first, so that cluster wide rules can be overwritten
2485     foreach my $rule (@$rules, @$cluster_rules) {
2486         next if !$rule->{enable} || $rule->{errors};
2487         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2488
2489         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2490         eval {
2491             $rule->{logmsg} = "$rule->{action}: ";
2492             if ($rule->{type} eq 'group') {
2493                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2494             } elsif ($rule->{type} eq 'out') {
2495                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2496                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2497             }
2498         };
2499         warn $@ if $@;
2500         delete $rule->{iface_out};
2501     }
2502
2503     # allow standard traffic on cluster network
2504     if ($localnet && ($ipversion == $localnet_ver)) {
2505         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2506         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2507         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2508         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2509
2510         my $corosync_rule = "-p udp --dport 5404:5405";
2511         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2512         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2513     }
2514
2515     # implement output policy
2516     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2517     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2518
2519     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2520     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2521 }
2522
2523 sub generate_group_rules {
2524     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2525
2526     my $rules = $cluster_conf->{groups}->{$group};
2527
2528     if (!$rules) {
2529         warn "no such security group '$group'\n";
2530         $rules = []; # create empty chain
2531     }
2532
2533     my $chain = "GROUP-${group}-IN";
2534
2535     ruleset_create_chain($ruleset, $chain);
2536     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2537
2538     foreach my $rule (@$rules) {
2539         next if $rule->{type} ne 'in';
2540         next if !$rule->{enable} || $rule->{errors};
2541         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2542         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2543         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2544     }
2545
2546     $chain = "GROUP-${group}-OUT";
2547
2548     ruleset_create_chain($ruleset, $chain);
2549     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2550
2551     foreach my $rule (@$rules) {
2552         next if $rule->{type} ne 'out';
2553         next if !$rule->{enable} || $rule->{errors};
2554         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2555         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2556         # check also other tap rules later
2557         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2558         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2559     }
2560 }
2561
2562 my $MAX_NETS = 32;
2563 my $valid_netdev_names = {};
2564 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2565     $valid_netdev_names->{"net$i"} = 1;
2566 }
2567
2568 sub get_mark_values {
2569     my ($value, $mask) = @_;
2570     $value = hex($value) if $value =~ /^0x/;
2571     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2572     $mask = 0xffffffff if !defined($mask);
2573     return ($value, $mask);
2574 }
2575
2576 sub parse_fw_rule {
2577     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2578
2579     my $orig_line = $line;
2580
2581     my $rule = {};
2582
2583     # we can add single line comments to the end of the rule
2584     if ($line =~ s/#\s*(.*?)\s*$//) {
2585         $rule->{comment} = decode('utf8', $1);
2586     }
2587
2588     # we can disable a rule when prefixed with '|'
2589
2590     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2591
2592     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2593         die "unable to parse rule: $line\n";
2594
2595     $rule->{type} = lc($1);
2596     $rule->{action} = $2;
2597
2598     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2599         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2600             $rule->{macro} = $1;
2601             $rule->{action} = $2;
2602         }
2603     }
2604
2605     while (length($line)) {
2606         if ($line =~ s/^-i (\S+)\s*//) {
2607             $rule->{iface} = $1;
2608             next;
2609         }
2610
2611         last if $rule->{type} eq 'group';
2612
2613         if ($line =~ s/^-p (\S+)\s*//) {
2614             $rule->{proto} = $1;
2615             next;
2616         }
2617
2618         if ($line =~ s/^-dport (\S+)\s*//) {
2619             $rule->{dport} = $1;
2620             next;
2621         }
2622
2623         if ($line =~ s/^-sport (\S+)\s*//) {
2624             $rule->{sport} = $1;
2625             next;
2626         }
2627         if ($line =~ s/^-source (\S+)\s*//) {
2628             $rule->{source} = $1;
2629             next;
2630         }
2631         if ($line =~ s/^-dest (\S+)\s*//) {
2632             $rule->{dest} = $1;
2633             next;
2634         }
2635         if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2636             $rule->{log} = $1;
2637             next;
2638         }
2639
2640         last;
2641     }
2642
2643     die "unable to parse rule parameters: $line\n" if length($line);
2644
2645     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2646     if ($rule->{errors}) {
2647         # The verbose flag really means we're running from the CLI and want
2648         # output on the console - in the other case we really want such errors
2649         # to go into the syslog instead.
2650         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2651         $log->("$prefix - errors in rule parameters: $orig_line\n");
2652         foreach my $p (keys %{$rule->{errors}}) {
2653             $log->("  $p: $rule->{errors}->{$p}\n");
2654         }
2655     }
2656
2657     return $rule;
2658 }
2659
2660 sub verify_ethertype {
2661     my ($value) = @_;
2662     my $types = get_etc_ethertypes();
2663     die "unknown ethernet protocol type: $value\n"
2664         if !defined($types->{byname}->{$value}) &&
2665            !defined($types->{byid}->{$value});
2666 }
2667
2668 sub parse_vmfw_option {
2669     my ($line) = @_;
2670
2671     my ($opt, $value);
2672
2673     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2674
2675     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2676         $opt = lc($1);
2677         $value = int($2);
2678     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2679         $opt = lc($1);
2680         $value = $2 ? lc($3) : '';
2681     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2682         $opt = lc($1);
2683         $value = uc($3);
2684     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2685         $opt = lc($1);
2686         $value = $2;
2687     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2688         $opt = lc($1);
2689         $value = $2;
2690         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2691     } else {
2692         die "can't parse option '$line'\n"
2693     }
2694
2695     return ($opt, $value);
2696 }
2697
2698 sub parse_hostfw_option {
2699     my ($line) = @_;
2700
2701     my ($opt, $value);
2702
2703     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2704
2705     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2706         $opt = lc($1);
2707         $value = int($2);
2708     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2709         $opt = lc($1);
2710         $value = $2 ? lc($3) : '';
2711     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2712         $opt = lc($1);
2713         $value = int($2);
2714     } else {
2715         die "can't parse option '$line'\n"
2716     }
2717
2718     return ($opt, $value);
2719 }
2720
2721 sub parse_clusterfw_option {
2722     my ($line) = @_;
2723
2724     my ($opt, $value);
2725
2726     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2727         $opt = lc($1);
2728         $value = int($2);
2729         if (($value > 1) && ((time() - $value) > 60)) {
2730             $value = 0
2731         }
2732     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2733         $opt = lc($1);
2734         $value = int($2);
2735     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2736         $opt = lc($1);
2737         $value = uc($3);
2738     } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2739         $opt = lc($1);
2740         $value = $2;
2741     } else {
2742         die "can't parse option '$line'\n"
2743     }
2744
2745     return ($opt, $value);
2746 }
2747
2748 sub resolve_alias {
2749     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2750
2751     my $alias = lc($cidr);
2752     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2753     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2754
2755     die "no such alias '$cidr'\n" if !$e;;
2756
2757     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2758 }
2759
2760 sub parse_ip_or_cidr {
2761     my ($cidr) = @_;
2762
2763     my $ipversion;
2764
2765     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2766         $cidr =~ s|/128$||;
2767         $ipversion = 6;
2768     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2769         $cidr =~ s|/32$||;
2770         $ipversion = 4;
2771     } else {
2772         die "value does not look like a valid IP address or CIDR network\n";
2773     }
2774
2775     return wantarray ? ($cidr, $ipversion) : $cidr;
2776 }
2777
2778 sub parse_alias {
2779     my ($line) = @_;
2780
2781     # we can add single line comments to the end of the line
2782     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2783
2784     if ($line =~ m/^(\S+)\s(\S+)$/) {
2785         my ($name, $cidr) = ($1, $2);
2786         my $ipversion;
2787
2788         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2789
2790         my $data = {
2791             name => $name,
2792             cidr => $cidr,
2793             ipversion => $ipversion,
2794         };
2795         $data->{comment} = $comment  if $comment;
2796         return $data;
2797     }
2798
2799     return undef;
2800 }
2801
2802 sub generic_fw_config_parser {
2803     my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2804
2805     my $section;
2806     my $group;
2807
2808     my $res = $empty_conf;
2809
2810     my $raw;
2811     if ($filename =~ m!^/etc/pve/(.*)$!) {
2812         $raw = PVE::Cluster::get_config($1);
2813     } else {
2814         $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2815     }
2816     return {} if !$raw;
2817
2818     my $linenr = 0;
2819     while ($raw =~ /^\h*(.*?)\h*$/gm) {
2820         my $line = $1;
2821         $linenr++;
2822         next if $line =~ m/^#/;
2823         next if $line =~ m/^\s*$/;
2824         chomp $line;
2825
2826         my $prefix = "$filename (line $linenr)";
2827
2828         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2829             $section = 'options';
2830             next;
2831         }
2832
2833         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2834             $section = 'aliases';
2835             next;
2836         }
2837
2838         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2839             $section = 'groups';
2840             $group = lc($1);
2841             my $comment = $2;
2842             eval {
2843                 die "security group name too long\n" if length($group) > $max_group_name_length;
2844                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2845             };
2846             if (my $err = $@) {
2847                 ($section, $group, $comment) = undef;
2848                 warn "$prefix: $err";
2849                 next;
2850             }
2851
2852             $res->{$section}->{$group} = [];
2853             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2854                 if $comment;
2855             next;
2856         }
2857
2858         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2859             $section = 'rules';
2860             next;
2861         }
2862
2863         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2864             $section = 'ipset';
2865             $group = lc($1);
2866             my $comment = $2;
2867             eval {
2868                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2869                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2870             };
2871             if (my $err = $@) {
2872                 ($section, $group, $comment) = undef;
2873                 warn "$prefix: $err";
2874                 next;
2875             }
2876
2877             $res->{$section}->{$group} = [];
2878             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2879                 if $comment;
2880             next;
2881         }
2882
2883         if (!$section) {
2884             warn "$prefix: skip line - no section\n";
2885             next;
2886         }
2887
2888         if ($section eq 'options') {
2889             eval {
2890                 my ($opt, $value);
2891                 if ($rule_env eq 'cluster') {
2892                     ($opt, $value) = parse_clusterfw_option($line);
2893                 } elsif ($rule_env eq 'host') {
2894                     ($opt, $value) = parse_hostfw_option($line);
2895                 } else {
2896                     ($opt, $value) = parse_vmfw_option($line);
2897                 }
2898                 $res->{options}->{$opt} = $value;
2899             };
2900             warn "$prefix: $@" if $@;
2901         } elsif ($section eq 'aliases') {
2902             eval {
2903                 my $data = parse_alias($line);
2904                 $res->{aliases}->{lc($data->{name})} = $data;
2905             };
2906             warn "$prefix: $@" if $@;
2907         } elsif ($section eq 'rules') {
2908             my $rule;
2909             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
2910             if (my $err = $@) {
2911                 warn "$prefix: $err";
2912                 next;
2913             }
2914             push @{$res->{$section}}, $rule;
2915         } elsif ($section eq 'groups') {
2916             my $rule;
2917             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
2918             if (my $err = $@) {
2919                 warn "$prefix: $err";
2920                 next;
2921             }
2922             push @{$res->{$section}->{$group}}, $rule;
2923         } elsif ($section eq 'ipset') {
2924             # we can add single line comments to the end of the rule
2925             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2926
2927             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2928             my $nomatch = $1;
2929             my $cidr = $2;
2930             my $errors;
2931
2932             if ($nomatch && !$feature_ipset_nomatch) {
2933                 $errors->{nomatch} = "nomatch not supported by kernel";
2934             }
2935
2936             eval {
2937                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2938                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2939                 } else {
2940                     $cidr = parse_ip_or_cidr($cidr);
2941                 }
2942             };
2943             if (my $err = $@) {
2944                 chomp $err;
2945                 $errors->{cidr} = $err;
2946             }
2947
2948             if ($cidr =~ m!/0+$!) {
2949                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2950             }
2951
2952             my $entry = { cidr => $cidr };
2953             $entry->{nomatch} = 1 if $nomatch;
2954             $entry->{comment} = $comment if $comment;
2955             $entry->{errors} =  $errors if $errors;
2956
2957             if ($verbose && $errors) {
2958                 warn "$prefix - errors in ipset '$group': $line\n";
2959                 foreach my $p (keys %{$errors}) {
2960                     warn "  $p: $errors->{$p}\n";
2961                 }
2962             }
2963
2964             push @{$res->{$section}->{$group}}, $entry;
2965         } else {
2966             warn "$prefix: skip line - unknown section\n";
2967             next;
2968         }
2969     }
2970
2971     return $res;
2972 }
2973
2974 sub run_locked {
2975     my ($code, @param) = @_;
2976
2977     my $timeout = 10;
2978
2979     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2980
2981     die $@ if $@;
2982
2983     return $res;
2984 }
2985
2986 sub read_local_vm_config {
2987
2988     my $qemu = {};
2989     my $lxc = {};
2990
2991     my $vmdata = { qemu => $qemu, lxc => $lxc };
2992
2993     my $vmlist = PVE::Cluster::get_vmlist();
2994     return $vmdata if !$vmlist || !$vmlist->{ids};
2995     my $ids = $vmlist->{ids};
2996
2997     foreach my $vmid (keys %$ids) {
2998         next if !$vmid; # skip VE0
2999         my $d = $ids->{$vmid};
3000         next if !$d->{node} || $d->{node} ne $nodename;
3001         next if !$d->{type};
3002         if ($d->{type} eq 'qemu') {
3003             if ($have_qemu_server) {
3004                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3005                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3006                     $qemu->{$vmid} = $conf;
3007                 }
3008             }
3009         } elsif ($d->{type} eq 'lxc') {
3010             if ($have_lxc) {
3011                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3012                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3013                     $lxc->{$vmid} = $conf;
3014                 }
3015             }
3016         }
3017     }
3018
3019     return $vmdata;
3020 };
3021
3022 sub load_vmfw_conf {
3023     my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3024
3025     $dir = $pvefw_conf_dir if !defined($dir);
3026     my $filename = "$dir/$vmid.fw";
3027
3028     my $empty_conf = {
3029         rules => [],
3030         options => {},
3031         aliases => {},
3032         ipset => {} ,
3033         ipset_comments => {},
3034     };
3035
3036     my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3037     $vmfw_conf->{vmid} = $vmid;
3038
3039     return $vmfw_conf;
3040 }
3041
3042 my $format_rules = sub {
3043     my ($rules, $allow_iface) = @_;
3044
3045     my $raw = '';
3046
3047     foreach my $rule (@$rules) {
3048         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3049             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3050             $raw .= uc($rule->{type});
3051             if ($rule->{macro}) {
3052                 $raw .= " $rule->{macro}($rule->{action})";
3053             } else {
3054                 $raw .= " " . $rule->{action};
3055             }
3056             if ($allow_iface && $rule->{iface}) {
3057                 $raw .= " -i $rule->{iface}";
3058             }
3059
3060             if ($rule->{type} ne  'group')  {
3061                 $raw .= " -source $rule->{source}" if $rule->{source};
3062                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3063                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3064                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3065                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3066                 $raw .= " -log $rule->{log}" if $rule->{log};
3067             }
3068
3069             $raw .= " # " . encode('utf8', $rule->{comment})
3070                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3071             $raw .= "\n";
3072         } else {
3073             die "unknown rule type '$rule->{type}'";
3074         }
3075     }
3076
3077     return $raw;
3078 };
3079
3080 my $format_options = sub {
3081     my ($options) = @_;
3082
3083     my $raw = '';
3084
3085     $raw .= "[OPTIONS]\n\n";
3086     foreach my $opt (keys %$options) {
3087         $raw .= "$opt: $options->{$opt}\n";
3088     }
3089     $raw .= "\n";
3090
3091     return $raw;
3092 };
3093
3094 my $format_aliases = sub {
3095     my ($aliases) = @_;
3096
3097     my $raw = '';
3098
3099     $raw .= "[ALIASES]\n\n";
3100     foreach my $k (keys %$aliases) {
3101         my $e = $aliases->{$k};
3102         $raw .= "$e->{name} $e->{cidr}";
3103         $raw .= " # " . encode('utf8', $e->{comment})
3104             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3105         $raw .= "\n";
3106     }
3107     $raw .= "\n";
3108
3109     return $raw;
3110 };
3111
3112 my $format_ipsets = sub {
3113     my ($fw_conf) = @_;
3114
3115     my $raw = '';
3116
3117     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3118         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3119             my $utf8comment = encode('utf8', $comment);
3120             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3121         } else {
3122             $raw .= "[IPSET $ipset]\n\n";
3123         }
3124         my $options = $fw_conf->{ipset}->{$ipset};
3125
3126         my $nethash = {};
3127         foreach my $entry (@$options) {
3128             $nethash->{$entry->{cidr}} = $entry;
3129         }
3130
3131         foreach my $cidr (sort keys %$nethash) {
3132             my $entry = $nethash->{$cidr};
3133             my $line = $entry->{nomatch} ? '!' : '';
3134             $line .= $entry->{cidr};
3135             $line .= " # " . encode('utf8', $entry->{comment})
3136                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3137             $raw .= "$line\n";
3138         }
3139
3140         $raw .= "\n";
3141     }
3142
3143     return $raw;
3144 };
3145
3146 sub save_vmfw_conf {
3147     my ($vmid, $vmfw_conf) = @_;
3148
3149     my $raw = '';
3150
3151     my $options = $vmfw_conf->{options};
3152     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3153
3154     my $aliases = $vmfw_conf->{aliases};
3155     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3156
3157     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3158
3159     my $rules = $vmfw_conf->{rules} || [];
3160     if ($rules && scalar(@$rules)) {
3161         $raw .= "[RULES]\n\n";
3162         $raw .= &$format_rules($rules, 1);
3163         $raw .= "\n";
3164     }
3165
3166     my $filename = "$pvefw_conf_dir/$vmid.fw";
3167     if ($raw) {
3168         mkdir $pvefw_conf_dir;
3169         PVE::Tools::file_set_contents($filename, $raw);
3170     } else {
3171         unlink $filename;
3172     }
3173 }
3174
3175 sub remove_vmfw_conf {
3176     my ($vmid) = @_;
3177
3178     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3179
3180     unlink $vmfw_conffile;
3181 }
3182
3183 sub clone_vmfw_conf {
3184     my ($vmid, $newid) = @_;
3185
3186     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3187     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3188
3189     if (-f $clonevm_conffile) {
3190         unlink $clonevm_conffile;
3191     }
3192     if (-f $sourcevm_conffile) {
3193         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3194         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3195     }
3196 }
3197
3198 sub read_vm_firewall_configs {
3199     my ($cluster_conf, $vmdata, $dir) = @_;
3200
3201     my $vmfw_configs = {};
3202
3203     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3204         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
3205         next if !$vmfw_conf->{options}; # skip if file does not exists
3206         $vmfw_configs->{$vmid} = $vmfw_conf;
3207     }
3208     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3209         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3210         next if !$vmfw_conf->{options}; # skip if file does not exists
3211         $vmfw_configs->{$vmid} = $vmfw_conf;
3212     }
3213
3214     return $vmfw_configs;
3215 }
3216
3217 sub get_option_log_level {
3218     my ($options, $k) = @_;
3219
3220     my $v = $options->{$k};
3221     $v = $default_log_level if !defined($v);
3222
3223     return undef if $v eq '' || $v eq 'nolog';
3224
3225     return $v if defined($log_level_hash->{$v});
3226
3227     warn "unknown log level ($k = '$v')\n";
3228
3229     return undef;
3230 }
3231
3232 sub generate_std_chains {
3233     my ($ruleset, $options, $ipversion) = @_;
3234
3235     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3236
3237     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3238     my $chain = 'PVEFW-smurflog';
3239     if ( $std_chains->{$chain} ) {
3240         foreach my $r (@{$std_chains->{$chain}}) {
3241           $r->{log} = $loglevel;
3242         }
3243     }
3244
3245     # same as shorewall logflags action.
3246     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3247     $chain = 'PVEFW-logflags';
3248     if ( $std_chains->{$chain} ) {
3249         foreach my $r (@{$std_chains->{$chain}}) {
3250           $r->{log} = $loglevel;
3251         }
3252     }
3253
3254     foreach my $chain (keys %$std_chains) {
3255         ruleset_create_chain($ruleset, $chain);
3256         foreach my $rule (@{$std_chains->{$chain}}) {
3257             if (ref($rule)) {
3258                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3259             } else {
3260                 die "rule $rule as string - should not happen";
3261             }
3262         }
3263     }
3264 }
3265
3266 sub generate_ipset_chains {
3267     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3268
3269     foreach my $ipset (keys %{$ipsets}) {
3270
3271         my $options = $ipsets->{$ipset};
3272
3273         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3274             if (my $ips = $device_ips->{$1}) {
3275                 $options = [@$options, @$ips];
3276             }
3277         }
3278
3279         # remove duplicates
3280         my $nethash = {};
3281         foreach my $entry (@$options) {
3282             next if $entry->{errors}; # skip entries with errors
3283             eval {
3284                 my ($cidr, $ver);
3285                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3286                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3287                 } else {
3288                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3289                 }
3290                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3291                 if ($ver == 6) {
3292                     # ip_compress_address takes an address only, no CIDR
3293                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3294                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3295                     $cidr .= $prefix_len if defined($prefix_len);
3296                     $cidr =~ s|/128$||;
3297                 } else {
3298                     $cidr =~ s|/32$||;
3299                 }
3300
3301                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3302             };
3303             warn $@ if $@;
3304         }
3305
3306         foreach my $ipversion (4, 6) {
3307             my $data = $nethash->{$ipversion};
3308
3309             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3310
3311             my $hashsize = scalar(@$options);
3312             if ($hashsize <= 64) {
3313                 $hashsize = 64;
3314             } else {
3315                 $hashsize = round_powerof2($hashsize);
3316             }
3317
3318             my $family = $ipversion == "6" ? "inet6" : "inet";
3319
3320             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3321
3322             foreach my $cidr (sort keys %$data) {
3323                 my $entry = $data->{$cidr};
3324
3325                 my $cmd = "add $name $cidr";
3326                 if ($entry->{nomatch}) {
3327                     if ($feature_ipset_nomatch) {
3328                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3329                     } else {
3330                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3331                     }
3332                 } else {
3333                     push @{$ipset_ruleset->{$name}}, $cmd;
3334                 }
3335             }
3336         }
3337     }
3338 }
3339
3340 sub round_powerof2 {
3341     my ($int) = @_;
3342
3343     $int--;
3344     $int |= $int >> $_ foreach (1,2,4,8,16);
3345     return ++$int;
3346 }
3347
3348 my $set_global_log_ratelimit = sub {
3349     my $cluster_opts = shift;
3350
3351     $global_log_ratelimit = '--limit 1/sec';
3352     if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3353         my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3354         my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3355
3356         if ($limit->{enable}) {
3357             if (my $rate = $limit->{rate}) {
3358                 $global_log_ratelimit = "--limit $rate";
3359             }
3360             if (my $burst = $limit->{burst}) {
3361                 $global_log_ratelimit .= " --limit-burst $burst";
3362             }
3363         } else {
3364             $global_log_ratelimit = undef;
3365         }
3366     }
3367 };
3368
3369 sub load_clusterfw_conf {
3370     my ($filename) = @_;
3371
3372     $filename = $clusterfw_conf_filename if !defined($filename);
3373     my $empty_conf = {
3374         rules => [],
3375         options => {},
3376         aliases => {},
3377         groups => {},
3378         group_comments => {},
3379         ipset => {} ,
3380         ipset_comments => {},
3381     };
3382
3383     my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3384     $set_global_log_ratelimit->($cluster_conf->{options});
3385
3386     return $cluster_conf;
3387 }
3388
3389 sub save_clusterfw_conf {
3390     my ($cluster_conf) = @_;
3391
3392     my $raw = '';
3393
3394     my $options = $cluster_conf->{options};
3395     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3396
3397     my $aliases = $cluster_conf->{aliases};
3398     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3399
3400     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3401
3402     my $rules = $cluster_conf->{rules};
3403     if ($rules && scalar(@$rules)) {
3404         $raw .= "[RULES]\n\n";
3405         $raw .= &$format_rules($rules, 1);
3406         $raw .= "\n";
3407     }
3408
3409     if ($cluster_conf->{groups}) {
3410         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3411             my $rules = $cluster_conf->{groups}->{$group};
3412             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3413                 my $utf8comment = encode('utf8', $comment);
3414                 $raw .= "[group $group] # $utf8comment\n\n";
3415             } else {
3416                 $raw .= "[group $group]\n\n";
3417             }
3418
3419             $raw .= &$format_rules($rules, 0);
3420             $raw .= "\n";
3421         }
3422     }
3423
3424     if ($raw) {
3425         mkdir $pvefw_conf_dir;
3426         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3427     } else {
3428         unlink $clusterfw_conf_filename;
3429     }
3430 }
3431
3432 sub load_hostfw_conf {
3433     my ($cluster_conf, $filename) = @_;
3434
3435     $filename = $hostfw_conf_filename if !defined($filename);
3436
3437     my $empty_conf = { rules => [], options => {}};
3438     return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
3439 }
3440
3441 sub save_hostfw_conf {
3442     my ($hostfw_conf) = @_;
3443
3444     my $raw = '';
3445
3446     my $options = $hostfw_conf->{options};
3447     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3448
3449     my $rules = $hostfw_conf->{rules};
3450     if ($rules && scalar(@$rules)) {
3451         $raw .= "[RULES]\n\n";
3452         $raw .= &$format_rules($rules, 1);
3453         $raw .= "\n";
3454     }
3455
3456     if ($raw) {
3457         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3458     } else {
3459         unlink $hostfw_conf_filename;
3460     }
3461 }
3462
3463 sub compile {
3464     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
3465
3466     my $vmfw_configs;
3467
3468     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3469     $pve_std_chains = dclone($pve_std_chains_conf);
3470
3471     if ($vmdata) { # test mode
3472         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3473         my $filename = "$testdir/cluster.fw";
3474         $cluster_conf = load_clusterfw_conf($filename);
3475
3476         $filename = "$testdir/host.fw";
3477         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3478
3479         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3480     } else { # normal operation
3481         $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3482
3483         $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3484
3485         $vmdata = read_local_vm_config();
3486         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3487     }
3488
3489     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3490
3491     my $localnet;
3492     if ($cluster_conf->{aliases}->{local_network}) {
3493         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3494     } else {
3495         my $localnet_ver;
3496         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3497
3498         $cluster_conf->{aliases}->{local_network} = {
3499             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3500     }
3501
3502     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3503
3504     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4);
3505     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6);
3506     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3507     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3508
3509     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3510 }
3511
3512 sub compile_iptables_filter {
3513     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion) = @_;
3514
3515     my $ruleset = {};
3516
3517     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3518     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3519
3520     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3521
3522     my $hostfw_options = $hostfw_conf->{options} || {};
3523
3524     # fixme: what log level should we use here?
3525     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3526
3527     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3528     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3529
3530     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3531     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3532
3533     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3534
3535     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3536     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3537
3538     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3539
3540     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3541
3542     if ($hostfw_enable) {
3543         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3544         warn $@ if $@; # just to be sure - should not happen
3545     }
3546
3547     # generate firewall rules for QEMU VMs
3548     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3549         eval {
3550             my $conf = $vmdata->{qemu}->{$vmid};
3551             my $vmfw_conf = $vmfw_configs->{$vmid};
3552             return if !$vmfw_conf;
3553
3554             foreach my $netid (sort keys %$conf) {
3555                 next if $netid !~ m/^net(\d+)$/;
3556                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3557                 next if !$net->{firewall};
3558                 my $iface = "tap${vmid}i$1";
3559
3560                 my $macaddr = $net->{macaddr};
3561                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3562                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3563                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3564                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3565             }
3566         };
3567         warn $@ if $@; # just to be sure - should not happen
3568     }
3569
3570     # generate firewall rules for LXC containers
3571     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3572         eval {
3573             my $conf = $vmdata->{lxc}->{$vmid};
3574             my $vmfw_conf = $vmfw_configs->{$vmid};
3575             return if !$vmfw_conf;
3576
3577             if ($vmfw_conf->{options}->{enable}) {
3578                 foreach my $netid (sort keys %$conf) {
3579                     next if $netid !~ m/^net(\d+)$/;
3580                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3581                     next if !$net->{firewall};
3582                     my $iface = "veth${vmid}i$1";
3583                     my $macaddr = $net->{hwaddr};
3584                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3585                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3586                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3587                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3588                 }
3589             }
3590         };
3591         warn $@ if $@; # just to be sure - should not happen
3592     }
3593
3594     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3595         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3596     }
3597
3598     return $ruleset;
3599 }
3600
3601 sub mac_to_linklocal {
3602     my ($macaddr) = @_;
3603     my @parts = split(/:/, $macaddr);
3604     # The standard link local address uses the fe80::/64 prefix with the
3605     # modified EUI-64 identifier derived from the MAC address by flipping the
3606     # universal/local bit and inserting FF:FE in the middle.
3607     # See RFC 4291.
3608     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3609     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3610     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3611 }
3612
3613 sub compile_ipsets {
3614     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3615
3616     my $localnet;
3617     if ($cluster_conf->{aliases}->{local_network}) {
3618         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3619     } else {
3620         my $localnet_ver;
3621         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3622
3623         $cluster_conf->{aliases}->{local_network} = {
3624             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3625     }
3626
3627     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3628
3629
3630     my $ipset_ruleset = {};
3631
3632     # generate ipsets for QEMU VMs
3633     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3634         eval {
3635             my $conf = $vmdata->{qemu}->{$vmid};
3636             my $vmfw_conf = $vmfw_configs->{$vmid};
3637             return if !$vmfw_conf;
3638
3639             # When the 'ipfilter' option is enabled every device for which there
3640             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3641             # ipset.
3642             # The reason is that ipfilter ipsets are always filled with standard
3643             # IPv6 link-local filters.
3644             my $ipsets = $vmfw_conf->{ipset};
3645             my $implicit_sets = {};
3646
3647             my $device_ips = {};
3648             foreach my $netid (keys %$conf) {
3649                 next if $netid !~ m/^net(\d+)$/;
3650                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3651                 next if !$net->{firewall};
3652
3653                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3654                     $implicit_sets->{"ipfilter-$netid"} = [];
3655                 }
3656
3657                 my $macaddr = $net->{macaddr};
3658                 my $linklocal = mac_to_linklocal($macaddr);
3659                 $device_ips->{$netid} = [
3660                     { cidr => $linklocal },
3661                     { cidr => 'fe80::/10', nomatch => 1 }
3662                 ];
3663             }
3664
3665             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3666             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3667         };
3668         warn $@ if $@; # just to be sure - should not happen
3669     }
3670
3671     # generate firewall rules for LXC containers
3672     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3673         eval {
3674             my $conf = $vmdata->{lxc}->{$vmid};
3675             my $vmfw_conf = $vmfw_configs->{$vmid};
3676             return if !$vmfw_conf;
3677
3678             # When the 'ipfilter' option is enabled every device for which there
3679             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3680             # ipset.
3681             # The reason is that ipfilter ipsets are always filled with standard
3682             # IPv6 link-local filters, as well as the IP addresses configured
3683             # for the container.
3684             my $ipsets = $vmfw_conf->{ipset};
3685             my $implicit_sets = {};
3686
3687             my $device_ips = {};
3688             foreach my $netid (keys %$conf) {
3689                 next if $netid !~ m/^net(\d+)$/;
3690                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3691                 next if !$net->{firewall};
3692
3693                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3694                     $implicit_sets->{"ipfilter-$netid"} = [];
3695                 }
3696
3697                 my $macaddr = $net->{hwaddr};
3698                 my $linklocal = mac_to_linklocal($macaddr);
3699                 my $set = $device_ips->{$netid} = [
3700                     { cidr => $linklocal },
3701                     { cidr => 'fe80::/10', nomatch => 1 }
3702                 ];
3703                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3704                     push @$set, { cidr => $1 };
3705                 }
3706                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3707                     push @$set, { cidr => $1 };
3708                 }
3709             }
3710
3711             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3712             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3713         };
3714         warn $@ if $@; # just to be sure - should not happen
3715     }
3716
3717     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3718
3719     return $ipset_ruleset;
3720 }
3721
3722 sub compile_ebtables_filter {
3723     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3724
3725     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3726         return {};
3727     }
3728
3729     my $ruleset = {};
3730
3731     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3732
3733     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3734     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3735     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3736     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3737     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3738
3739     # generate firewall rules for QEMU VMs
3740     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3741         eval {
3742             my $conf = $vmdata->{qemu}->{$vmid};
3743             my $vmfw_conf = $vmfw_configs->{$vmid};
3744             return if !$vmfw_conf;
3745             my $ipsets = $vmfw_conf->{ipset};
3746
3747             foreach my $netid (sort keys %$conf) {
3748                 next if $netid !~ m/^net(\d+)$/;
3749                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3750                 next if !$net->{firewall};
3751                 my $iface = "tap${vmid}i$1";
3752                 my $macaddr = $net->{macaddr};
3753                 my $arpfilter = [];
3754                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3755                     foreach my $ipaddr (@$ipset) {
3756                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3757                         next if !$ip || ($version && $version != 4);
3758                         push(@$arpfilter, $ip);
3759                     }
3760                 }
3761                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3762             }
3763         };
3764         warn $@ if $@; # just to be sure - should not happen
3765     }
3766
3767     # generate firewall rules for LXC containers
3768     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3769         eval {
3770             my $conf = $vmdata->{lxc}->{$vmid};
3771
3772             my $vmfw_conf = $vmfw_configs->{$vmid};
3773             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3774             my $ipsets = $vmfw_conf->{ipset};
3775
3776             foreach my $netid (sort keys %$conf) {
3777                 next if $netid !~ m/^net(\d+)$/;
3778                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3779                 next if !$net->{firewall};
3780                 my $iface = "veth${vmid}i$1";
3781                 my $macaddr = $net->{hwaddr};
3782                 my $arpfilter = [];
3783                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3784                     foreach my $ipaddr (@$ipset) {
3785                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3786                         next if !$ip || ($version && $version != 4);
3787                         push(@$arpfilter, $ip);
3788                     }
3789                 }
3790                 push(@$arpfilter, $net->{ip}) if $net->{ip} && $vmfw_conf->{options}->{ipfilter};
3791                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3792             }
3793         };
3794         warn $@ if $@; # just to be sure - should not happen
3795     }
3796
3797     return $ruleset;
3798 }
3799
3800 sub generate_tap_layer2filter {
3801     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3802     my $options = $vmfw_conf->{options};
3803
3804     my $tapchain = $iface."-OUT";
3805
3806     # ebtables remove zeros from mac pairs
3807     $macaddr =~ s/0([0-9a-f])/$1/ig;
3808     $macaddr = lc($macaddr);
3809
3810     ruleset_create_chain($ruleset, $tapchain);
3811
3812     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3813             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3814     }
3815
3816     if (@$arpfilter){
3817         my $arpchain = $tapchain."-ARP";
3818         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3819         ruleset_create_chain($ruleset, $arpchain);
3820
3821         foreach my $ip (@{$arpfilter}) {
3822             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3823         }
3824         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3825     }
3826
3827     if (defined($options->{layer2_protocols})){
3828         my $protochain = $tapchain."-PROTO";
3829         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3830         ruleset_create_chain($ruleset, $protochain);
3831
3832         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3833             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
3834         }
3835         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
3836     }
3837
3838     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3839
3840     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3841 }
3842
3843 # the parameter $change_only_regex changes two things if defined:
3844 # * all chains not matching it will be left intact
3845 # * both the $active_chains hash and the returned status_hash have different
3846 #   structure (they contain a key named 'rules').
3847 sub get_ruleset_status {
3848     my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3849
3850     my $statushash = {};
3851
3852     foreach my $chain (sort keys %$ruleset) {
3853         my $rules = $ruleset->{$chain};
3854         my $sig = &$digest_fn($rules);
3855         my $oldsig;
3856
3857         $statushash->{$chain}->{sig} = $sig;
3858         if (defined($change_only_regex)) {
3859             $oldsig = $active_chains->{$chain}->{sig};
3860             $statushash->{$chain}->{rules} = $rules;
3861         } else {
3862             $oldsig = $active_chains->{$chain};
3863         }
3864         if (!defined($oldsig)) {
3865             $statushash->{$chain}->{action} = 'create';
3866         } else {
3867             if ($oldsig eq $sig) {
3868                 $statushash->{$chain}->{action} = 'exists';
3869             } else {
3870                 $statushash->{$chain}->{action} = 'update';
3871             }
3872         }
3873         if ($verbose) {
3874             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3875             foreach my $cmd (@{$rules}) {
3876                 print "\t$cmd\n";
3877             }
3878         }
3879     }
3880
3881     foreach my $chain (sort keys %$active_chains) {
3882         next if defined($ruleset->{$chain});
3883         my $action = 'delete';
3884         my $sig = $active_chains->{$chain};
3885         if (defined($change_only_regex)) {
3886             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3887             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3888             $sig = $sig->{sig};
3889         }
3890         $statushash->{$chain}->{action} = $action;
3891         $statushash->{$chain}->{sig} = $sig;
3892         print "$action $chain ($sig)\n" if $verbose;
3893     }
3894
3895     return $statushash;
3896 }
3897
3898 sub print_sig_rule {
3899     my ($chain, $sig) = @_;
3900
3901     # We just use this to store a SHA1 checksum used to detect changes
3902     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3903 }
3904
3905 sub get_ruleset_cmdlist {
3906     my ($ruleset, $iptablescmd) = @_;
3907
3908     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3909
3910     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3911     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3912
3913     # create missing chains first
3914     foreach my $chain (sort keys %$ruleset) {
3915         my $stat = $statushash->{$chain};
3916         die "internal error" if !$stat;
3917         next if $stat->{action} ne 'create';
3918
3919         $cmdlist .= ":$chain - [0:0]\n";
3920     }
3921
3922     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3923         my $chain = "PVEFW-$h";
3924         if ($ruleset->{$chain} && !$hooks->{$h}) {
3925             $cmdlist .= "-A $h -j $chain\n";
3926         }
3927     }
3928
3929     foreach my $chain (sort keys %$ruleset) {
3930         my $stat = $statushash->{$chain};
3931         die "internal error" if !$stat;
3932
3933         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3934             $cmdlist .= "-F $chain\n";
3935             foreach my $cmd (@{$ruleset->{$chain}}) {
3936                 $cmdlist .= "$cmd\n";
3937             }
3938             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3939         } elsif ($stat->{action} eq 'delete') {
3940             die "internal error"; # this should not happen
3941         } elsif ($stat->{action} eq 'exists') {
3942             # do nothing
3943         } else {
3944             die "internal error - unknown status '$stat->{action}'";
3945         }
3946     }
3947
3948     foreach my $chain (keys %$statushash) {
3949         next if $statushash->{$chain}->{action} ne 'delete';
3950         $cmdlist .= "-F $chain\n";
3951     }
3952     foreach my $chain (keys %$statushash) {
3953         next if $statushash->{$chain}->{action} ne 'delete';
3954         next if $chain eq 'PVEFW-INPUT';
3955         next if $chain eq 'PVEFW-OUTPUT';
3956         next if $chain eq 'PVEFW-FORWARD';
3957         $cmdlist .= "-X $chain\n";
3958     }
3959
3960     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3961
3962     $cmdlist .= "COMMIT\n";
3963
3964     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3965 }
3966
3967 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
3968
3969 sub get_ebtables_cmdlist {
3970     my ($ruleset) = @_;
3971
3972     my $changes = 0;
3973     my $cmdlist = "*filter\n";
3974
3975     my $active_chains = ebtables_get_chains();
3976     my $statushash = get_ruleset_status($ruleset, $active_chains,
3977                                         \&iptables_chain_digest,
3978                                         $pve_ebtables_chainname_regex);
3979
3980     # create chains first and make sure PVE rules are evaluated if active
3981     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
3982     my $pve_include = 0;
3983     foreach my $chain (sort keys %$statushash) {
3984         next if ($statushash->{$chain}->{action} eq 'delete');
3985         $cmdlist .= ":$chain ACCEPT\n";
3986         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
3987     }
3988
3989     foreach my $chain (sort keys %$statushash) {
3990         my $stat = $statushash->{$chain};
3991         next if ($stat->{action} eq 'delete');
3992         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
3993
3994         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
3995             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
3996                 next if ! $pve_include;
3997                 $pve_include = 0;
3998             }
3999             $cmdlist .= "$cmd\n";
4000         }
4001     }
4002     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4003
4004     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4005 }
4006
4007 sub get_ipset_cmdlist {
4008     my ($ruleset) = @_;
4009
4010     my $cmdlist = "";
4011
4012     my $delete_cmdlist = "";
4013
4014     my $active_chains = ipset_get_chains();
4015     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
4016
4017     # remove stale _swap chains
4018     foreach my $chain (keys %$active_chains) {
4019         if ($chain =~ m/^PVEFW-\S+_swap$/) {
4020             $cmdlist .= "destroy $chain\n";
4021         }
4022     }
4023
4024     foreach my $chain (keys %$ruleset) {
4025         my $stat = $statushash->{$chain};
4026         die "internal error" if !$stat;
4027
4028         if ($stat->{action} eq 'create') {
4029             foreach my $cmd (@{$ruleset->{$chain}}) {
4030                 $cmdlist .= "$cmd\n";
4031             }
4032         }
4033     }
4034
4035     foreach my $chain (keys %$ruleset) {
4036         my $stat = $statushash->{$chain};
4037         die "internal error" if !$stat;
4038
4039         if ($stat->{action} eq 'update') {
4040             my $chain_swap = $chain."_swap";
4041
4042             foreach my $cmd (@{$ruleset->{$chain}}) {
4043                 $cmd =~ s/$chain/$chain_swap/;
4044                 $cmdlist .= "$cmd\n";
4045             }
4046             $cmdlist .= "swap $chain_swap $chain\n";
4047             $cmdlist .= "flush $chain_swap\n";
4048             $cmdlist .= "destroy $chain_swap\n";
4049         }
4050     }
4051
4052      # the remove unused chains
4053     foreach my $chain (keys %$statushash) {
4054         next if $statushash->{$chain}->{action} ne 'delete';
4055
4056         $delete_cmdlist .= "flush $chain\n";
4057         $delete_cmdlist .= "destroy $chain\n";
4058     }
4059
4060     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4061
4062     return ($cmdlist, $delete_cmdlist, $changes);
4063 }
4064
4065 sub apply_ruleset {
4066     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4067
4068     enable_bridge_firewall();
4069
4070     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4071         get_ipset_cmdlist($ipset_ruleset);
4072
4073     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset);
4074     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables");
4075     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
4076
4077     if ($verbose) {
4078         if ($ipset_changes) {
4079             print "ipset changes:\n";
4080             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4081             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4082         }
4083
4084         if ($changes) {
4085             print "iptables changes:\n";
4086             print $cmdlist;
4087         }
4088
4089         if ($changesv6) {
4090             print "ip6tables changes:\n";
4091             print $cmdlistv6;
4092         }
4093
4094         if ($ebtables_changes) {
4095             print "ebtables changes:\n";
4096             print $ebtables_cmdlist;
4097         }
4098     }
4099
4100     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4101     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4102
4103     ipset_restore_cmdlist($ipset_create_cmdlist);
4104
4105     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4106     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4107
4108     iptables_restore_cmdlist($cmdlist);
4109
4110     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4111     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4112
4113     ip6tables_restore_cmdlist($cmdlistv6);
4114
4115     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4116     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4117
4118     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4119
4120     ebtables_restore_cmdlist($ebtables_cmdlist);
4121
4122     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4123     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4124
4125     # test: re-read status and check if everything is up to date
4126     my $active_chains = iptables_get_chains();
4127     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4128
4129     my $errors;
4130     foreach my $chain (sort keys %$ruleset) {
4131         my $stat = $statushash->{$chain};
4132         if ($stat->{action} ne 'exists') {
4133             warn "unable to update chain '$chain'\n";
4134             $errors = 1;
4135         }
4136     }
4137
4138     my $active_chainsv6 = iptables_get_chains("ip6tables");
4139     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest);
4140
4141     foreach my $chain (sort keys %$rulesetv6) {
4142         my $stat = $statushashv6->{$chain};
4143         if ($stat->{action} ne 'exists') {
4144             warn "unable to update chain '$chain'\n";
4145             $errors = 1;
4146         }
4147     }
4148
4149     my $active_ebtables_chains = ebtables_get_chains();
4150     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4151                                 $active_ebtables_chains, \&iptables_chain_digest,
4152                                 $pve_ebtables_chainname_regex);
4153
4154     foreach my $chain (sort keys %$ebtables_ruleset) {
4155         my $stat = $ebtables_statushash->{$chain};
4156         if ($stat->{action} ne 'exists') {
4157             warn "ebtables : unable to update chain '$chain'\n";
4158             $errors = 1;
4159         }
4160     }
4161
4162     die "unable to apply firewall changes\n" if $errors;
4163
4164     update_nf_conntrack_max($hostfw_conf);
4165
4166     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4167
4168     update_nf_conntrack_logging($hostfw_conf);
4169 }
4170
4171 sub update_nf_conntrack_max {
4172     my ($hostfw_conf) = @_;
4173
4174     my $max = 65536; # reasonable default
4175
4176     my $options = $hostfw_conf->{options} || {};
4177
4178     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4179         $max = $options->{nf_conntrack_max};
4180         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4181     }
4182
4183     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4184     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4185
4186     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4187
4188     if ($current != $max) {
4189         my $hashsize = int($max/4);
4190         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4191         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4192     }
4193 }
4194
4195 sub update_nf_conntrack_tcp_timeout_established {
4196     my ($hostfw_conf) = @_;
4197
4198     my $options = $hostfw_conf->{options} || {};
4199
4200     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4201
4202     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4203 }
4204
4205 my $log_nf_conntrack_enabled = undef;
4206 sub update_nf_conntrack_logging {
4207     my ($hostfw_conf) = @_;
4208
4209     my $options = $hostfw_conf->{options} || {};
4210     my $value = $options->{log_nf_conntrack} || 0;
4211     if (!defined($log_nf_conntrack_enabled)
4212         || $value != $log_nf_conntrack_enabled)
4213     {
4214         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4215         PVE::Tools::file_set_contents($tmpfile, $value);
4216
4217         PVE::Tools::run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4218         $log_nf_conntrack_enabled = $value;
4219     }
4220 }
4221
4222 sub remove_pvefw_chains {
4223
4224     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4225     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4226     PVE::Firewall::remove_pvefw_chains_ipset();
4227
4228 }
4229
4230 sub remove_pvefw_chains_iptables {
4231     my ($iptablescmd) = @_;
4232
4233     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
4234     my $cmdlist = "*filter\n";
4235
4236     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4237         if ($hooks->{$h}) {
4238             $cmdlist .= "-D $h -j PVEFW-$h\n";
4239         }
4240     }
4241
4242     foreach my $chain (keys %$chash) {
4243         $cmdlist .= "-F $chain\n";
4244     }
4245
4246     foreach my $chain (keys %$chash) {
4247         $cmdlist .= "-X $chain\n";
4248     }
4249     $cmdlist .= "COMMIT\n";
4250
4251     if($iptablescmd eq "ip6tables") {
4252         ip6tables_restore_cmdlist($cmdlist);
4253     } else {
4254         iptables_restore_cmdlist($cmdlist);
4255     }
4256 }
4257
4258 sub remove_pvefw_chains_ipset {
4259
4260     my $ipset_chains = ipset_get_chains();
4261
4262     my $cmdlist = "";
4263
4264     foreach my $chain (keys %$ipset_chains) {
4265         $cmdlist .= "flush $chain\n";
4266         $cmdlist .= "destroy $chain\n";
4267     }
4268
4269     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4270 }
4271
4272 sub init {
4273     my $cluster_conf = load_clusterfw_conf();
4274     my $cluster_options = $cluster_conf->{options};
4275     my $enable = $cluster_options->{enable};
4276
4277     return if !$enable;
4278
4279     # load required modules here
4280 }
4281
4282 sub update {
4283     my $code = sub {
4284
4285         my $cluster_conf = load_clusterfw_conf();
4286         my $cluster_options = $cluster_conf->{options};
4287
4288         if (!$cluster_options->{enable}) {
4289             PVE::Firewall::remove_pvefw_chains();
4290             return;
4291         }
4292
4293         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4294
4295         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4296
4297         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4298     };
4299
4300     run_locked($code);
4301 }
4302
4303 1;